The OB1 AXS 2x
The OB1 AXS 2x
The OB1 AXS 2x
The OB1 AXS 2x
The OB1 AXS 2x
The OB1 AXS 2x

The OB1 AXS 2x

Regular price $5,199.00

DETAILS

 

Overview                  Specs                  Geometry                  FAQ


For the roadie at heart. With a crisply shifting wireless electronic SRAM Force 2x drivetrain, hydraulic brakes, and the tightest gear jumps possible the OB1 AXS 2x will put you in the sweet spot as you push out miles on long rides. With our robust yet trim carbon wheelset and premium aluminum cockpit components, you get a parts spec that won’t let you down or leave you wanting.

Lead out the group ride, explore new dirt trails, or load up for a long adventure. Join the N=1 revolution.


Current lead time: 4-6 weeks
Weight: ~18 lbs (size M, standard seatpost)
Arrives 85% assembled (see prep guide)

How it works


Why you'll love the OB1

  • Endurance road geometry for all day comfort and balanced handling.
  • 700C graphene-infused carbon wheelsNote: The OB1 AXS 2x is not compatible with our 650B wheels, due to limited clearance with SRAM’s AXS front derailleur. It has clearance for up to 700C X 40mm tires. built for speed, strength, and durability at a race-ready weight.
  • Tubeless done right with high-volume tires matched to wide rims for easy set-up, fewer flats, greater efficiency, and an extra smooth ride.
  • Tailored fit with customizable choice of stem length, bar width, and crank length.

Gearing for every adventure

  • SRAM AXS wireless electronic drivetrain offers crisp light touch shifting.
  • Fluid damped pulley cage makes AXS the best SRAM 2x drivetrain to handle the rigors of unpaved riding without missing a beat.
  • AXS 2x provides the tightest gear jumps possible to help you find the sweet spot as you push out miles on a long ride, while offering massive gearing range.

Obsessive on the details

  • A creak-free bottom bracket with oversized Japanese stainless steel bearings and a 2-piece aluminum shell that threads together for perfect alignment.
  • Shock-absorbing bar tape and a remarkably comfortable saddle for all day riding.
  • Mounting points galore for bags, extra bottles, fenders, bento, and any other gear you need for your all-day (or all-month) adventure.

 


 

Specs

Chassis    |    Cockpit    |    Drivetrain & Braking    |    Wheels


Click on the name of each component to learn more about why we chose it.  Every detail, down to the bolts and bearings, is selected for the optimal balance of performance, durability, and serviceability.

To learn more about our approach, check out how we built a high-end carbon dream bike.

CHASSIS

DETAILS
- Endurance road geometry
- Clearance for 650B x 47mm or 700C x 40mm tires
- Discreet mounting points for: (5) bottle cages, racks, bento, and clip-on accessories
- Clean internal routing for hoses and full cable housings, with foam sleeves sheathing for sound dampening
- Round, dropper-ready 27.2 seat tube
- Accommodates up to 46T single or 50/34T double chainrings
- Reinforced Toray 800/700 blend carbon construction
- Fiberglass anti-corrosive layer at seatpost, bottom bracket, and headset interfaces
- 1145g +/-5% (medium, black finish, frame w/o hardware)

Choice of: XS, S, M, L, XL (See Geometry)
WHY WE CHOSE IT
From road to gravel to travel, our OB1 frameset is ready for every road. Its sleek road-bike design hides clearance for wide dirt tires and discreet mounting points for bags, fenders, racks, extra bottles, and everything else the ride demands. From reinforcement at every hole and boss, to anti-corrosive fiberglass where carbon meets metal, to bolt-secured aluminum cable guides, we've invested in the details to deliver you performance without compromise.
DETAILS
- Steersafe-reinforced carbon steerer
- Clearance for 650b x 47mm | 700c x 40mm tires
- Accommodations for fenders, headlight, light, and bottle cages
- 12x100mm thru-axle dropouts
- Reinforced Toray 800/700 carbon construction
- 495g total with SteerSafe installed
WHY WE CHOSE IT
We created SteerSafe to ensure your carbon steerer is fully supported against stem clamping forces. SteerSafe is an aluminum tube with built-in starnut that gets bonded into our carbon steerers at the factory. To shorten a SteerSafe equipped steerer, simply cut through the carbon and aluminum layers using a guide and a carbon-specific blade as you would a normal carbon steerer, then use ultra-fine sandpaper to create a smooth, slightly rounded edge. Finish by torquing the lubricated stem bolts to 5 Nm.
DETAILS
- Hollow bolt-on with 6mm hex head
- 12mm front | rear
- Thread length and pitch matched to OB1 frame/fork
- Machined 7075 aluminum
- 82g +/- 5% per set
WHY WE CHOSE IT
Each thru-axle is machined from a single billet of ultra-premium 7075 aluminum. With a built-in washer for smooth installation, our bolt-on thru-axles offer stiffness, security, and easy wheel removal without the extra ~100g of weight of levered designs and uses a 6mm hex wrench.
DETAILS
- Standard interface for even clamping
- Steel bolt & threaded insert for trouble-free adjustment
- Machined 7075 aluminum
- 20g +/-5%
WHY WE CHOSE IT
OB1's seat clamp achieves its integrated look while utilizing a traditional clamping interface that, unlike many proprietary integrated designs, evenly distributes clamping forces. This helps prevent damage to frame or post, post slippage, or post binding (dropper post). We finish it off with a lubricated nut and bolt for a lifetime of trouble-free use. Be sure to coat your seat post with grip paste before installing.
DETAILS
- Oversized 1-1/2" stainless steel angular contact lower bearing
- Standard 1 1/8" angular contact upper bearing
- Sealed upper cap
- Replaceable aluminum split crown race
WHY WE CHOSE IT
Selected for durability, OB1's extra large 1-1/2” angular contact lower cartridge bearing distributes the extreme loads this component experiences over more and larger balls. The sealed top cap provides an extra barrier to water penetration and its replaceable aluminum split crown race protects the carbon steerer crown from wear while being less prone to creaking than non-split races. While it adds a handful of grams relative to smaller diameter options, we don't believe in shedding weight at the expense of durability.
DETAILS
- 1-bolt replaceable
- Stiff for use with long-cage derailleurs
- Axle threads directly into the hanger
- Extra included just in case
WHY WE CHOSE IT
Flexy derailleur hangers compromise shifting and are quick to fail. OB1's is stiff and strong to withstand the greater loads placed on it by today's long-cage derailleurs and wide range cassettes, but will still sacrifice itself to protect the derailleur and frame in the event of a major impact. And don't worry - we include an extra just in case.
Mounting points for all your gear:
- 2 bottle mounts in the front triangle
- 1 bottle mount below the downtube
- 1 bento mount on the top tube
- 2 bottle mounts on the fork blades
- Front and rear fender mounts (seat stay bridge included)
- Wide central clamping area on handlebar
Note: For optimum performance, load your heaviest items in a frame bag secured in the main triangle.
Max weight of rider + gear: 115kg (254lb)

 

COCKPIT

STANDARD SEATPOST
DETAILS
- 1-piece 3D forged 2014-T6 aluminum quill
- Micro-adjustable 2-bolt clamp
- Broadly supportive lower clamp
- 0 offset to match OB1's 73° seattube angle
- 230g +/-5% (400mm), 210g +/-5% (350mm)
WHY WE CHOSE IT
OB1's seatpost weighs less than some carbon posts yet is safe to use with clamp-on accessories like bikepacking seat bags. Its quill is forged from a single billet of ultra-premium 2014-T6 aluminum for excellent strength to weight. The 2-bolt head and oversized lower clamp plate offer superior saddle security, support, and micro-adjustability.

This seatpost can be shortened using a standard steerer cutting guide and 32TPI hacksaw blade. Just be sure that there's at least 105mm of insertion into the frame (more is better) and that you sand or file the cut edges to round them off and remove burrs.
DROPPER SEATPOST  (+$199)
DETAILS
- Infinitely adjustable
- Lightweight 1-piece forged head and quill
- Secure 2-bolt saddle clamp with broad rail support
- Premium 7075-T651 aluminum construction
- Clean internally-routed design
- Serviceable with readily available parts
- Tests to an ISO MTB standard
- Actuated by an independent lever
- 405L|110mm (485g), 360L|90mm (460g), 310L|70mm (425g)

Pro Tip: Choose the longest dropper that fits your frame size and saddle height (see geo chart).
WHY WE CHOSE IT
A dropper post is a total game-changer. Dropping the saddle out of the way allows you to shift your center of mass down and back over the rear wheel, keeping your front end light and freeing your legs to act as suspension. The result is increased control, speed, and confidence over steep or aggressive terrain. They're even great for fast road descents. We've been riding droppers on our drop-bar bikes since before it was cool, so whether you're looking to get shreddy off-road or just want to feel safer on that high speed road sweeper, a dropper is an option well worth considering.

Want to learn more? Check out our deep dive.
DETAILS
- 116mm drop | 75mm reach | 10 ° flare
- Comfy flat top sections
- Wide 100-180mm x 31.8mm clamp area
- Double butted 6061 aluminum

Choice of: 360, 380, 400, 420, 440mm widths (center-to-center at the hoods)
WHY WE CHOSE IT
Aero on the tops, control and comfort in the drops. With a short reach, shallow drop, and subtle 10° of flare, our handlebar keeps you narrow when motoring on the hoods while offering greater leverage when cornering, descending, or shredding dirt in the drops, all while reducing back and wrist strain. Its wide central clamping area allows you to attach a bell, GPS, bar bag, aero clip-ons, or all 4 at once if that's what your adventure requires.
DETAILS
- 3D forged 7050 aluminum
- 7° angle
- 105g (100mm)

Choice of: 70, 80, 90, 100, 110, 120 mm lengths
WHY WE CHOSE IT
A top-of-the-line stem equivalent to others retailing at $100 or more, our 7050-series aluminum stem is strong and stiff yet lighter than others' $250+ carbon stems.
DETAILS
- 148 width
- 244 length
- Wide, supportive nose
- Pressure relieving padding and cutout
- Hollow Cr-Mo rails
- 261g +/- 5%
WHY WE CHOSE IT
Wide, short, cut-out saddles like this one first gained popularity among triathletes and time-trialists looking for improved comfort over long stints in extremely aggressive positions. Eventually roadies and mountain bikers discovered their benefits and brought them into their disciplines as well. With a bit more cushion for mixed terrain riding and hollow Cr-Mo rails for outstanding strength, this is a saddle meant for long days on rough roads.

We spec our Endurance 148 saddle across our entire line of bikes. Our riders love it so much that many have outfitted their entire stable with them.

 

DRIVETRAIN & BRAKING

DETAILS
- 46/33T
- 107BCD spider
WHY WE CHOSE IT
Mixed-terrain riding often requires ultra low gearing, particularly when slogging gear up steep dirt roads. We therefore went the lowest gearing possible within SRAM's line to achieve a 1:1 bottom end.

Note: if you're considering riding steep terrain, check out our OB1 AXS 1x option for its even more generous low end and comparable top gear.
DETAILS
- Broad 460% range (paired with 46/33T chainrings)
- 1:1 low end and 50x11T-equivalent top end
- Tightly spaced 10-33T cogs: 10,11,12,13,14,15,17,19,21,24,28,33
- Long-wearing ED black finish
- XDR freehub-compatible
- 267g
WHY WE CHOSE IT
Mixed-terrain riding often requires ultra low gearing, particularly when slogging gear up steep dirt roads. We therefore went the lowest gearing possible within SRAM's line to achieve a 1:1 bottom end.

Note: if you're considering riding steep terrain, check out our OB1 AXS 1x for its even more generous low end and comparable top gear.
DETAILS
- AXS wireless electronic
- Trimless Yaw design
- Braze-on interface
- 180g with battery
WHY WE CHOSE IT
For some riders, the tighter gear spacing of a 2x drivetrain is a must have. 2x also happens to be where the benefits of electronic shifting are fully realized.

We chose SRAM's Force AXS electronic front derailleur over top-end Red AXS due to its more durable, 10g heavier steel cage. No more thinking about shift-timing, cross-chaining, or other distractions associated with having to coordinate front and rear shifting. With motors and software doing the work of nailing each shift, you're free to focus on what really matters: the road ahead.
DETAILS
- Cage-lock feature for easy wheel swaps
- Roller bearing clutch eliminates derailleur bounce and chain slap
- Max 33t cassette
- 322g with battery
WHY WE CHOSE IT
For some riders, the tighter gear spacing of a 2x drivetrain is a must have. 2x also happens to be where the benefits of electronic shifting are fully realized.

As with the cable-actuated model we use on our original OB1, we chose SRAM's Force AXS Electronic Rear Derailleur for its slick shifting, convenient cage-lock feature, and chain-taming clutched design. It also happens to be functionally identical to SRAM's top-end Red AXS save for a difference of 15g.

No more thinking about shift-timing, cross-chaining, or other distractions associated with having to coordinate front and rear shifting. With motors and software doing the work of nailing each shift, you're free to focus on what really matters: the road ahead.
DETAILS
- Wireless 12-speed electronic shifting
- Powerful, easily modulated hydraulic disc braking
- Reach adjust to fit hands of all sizes
- Contact point adjustment to dial where the brake pads bite
- Port on each lever for "Blips"
- 750g (both levers with calipers, batteries, and hoses)
WHY WE CHOSE IT
SRAM's Force AXS levers take the excellent shifting and braking we've come to love from the SRAM mechanical levers we spec on the original OB1, but with light-touch wireless electronic shifting and the addition of contact point adjustment to dial how the brake pads bite. They are also functionally identical to the top-of-the-line Red AXS save for a ~15g difference in lever weight.
DETAILS
- 44T chainring
- Lightweight carbon arms
- SRAM DUB 29mm spindle

Choice of: 165, 170, 172.5, 175mm
WHY WE CHOSE IT
SRAM's Force AXS carbon cranks offer the best combination of light weight and durability of any crankset within the SRAM line.
DETAILS
- Precision-milled, thread-together aluminum shell
- Premium NSK Japan 6806 stainless steel sealed cartridge bearings
- Built to the open BB386EVO standard
- 135g

Note: Uses SRAM DUB 29mm spindle adaptors where appropriate.
WHY WE CHOSE IT
Our precision-milled, thread-together aluminum shell is strong and stiff to ensure perfect alignment and support our widely-spaced, large-ball cartridge bearings. It's the same $70+ solution that mechanics turn to when the cheap, plastic press fit bottom brackets creak and fail. It adds quite a bit of cost and a handful of grams, but we think the increased durability, efficiency-under-load, and general peace of mind are well worth the investment.
DETAILS
- SRAM 2x12-specific flat top design
- Quick link
- Silver chrome and nickel plated
- Solid chrome-hardened pins
- 266g (114 links)
WHY WE CHOSE IT
Chains are a wear item that should be checked, cleaned, lubed, and replaced frequently for optimal performance and to preserve your expensive chainrings, cassettes, and derailleur pulleys. Within SRAM's line, we chose the Force 12-speed chain for its hardened steels and anti-friction/anti-corrosion finishes.
DETAILS
- 160mm front/rear
- Smooth rounded edges
- 131g per wheel
WHY WE CHOSE IT
We're huge fans of the smooth-braking SRAM Centerline Centerlock rotors we spec on our original model. For our AXS model, we chose the upgraded XR version for its ~23g per wheel lighter weight.
DETAILS
- 2-port USB charger for SRAM eTAP AXS batteries
WHY WE CHOSE IT
An electronic drivetrain won't do you much good without a means to charge it, so we of course include a charger with every bike.


Want to use your own drivetrain? Check out our Bring Your Own Drivetrain option.

 

WHEELS

THESIS Aero-Wide Carbon 700C Wheels

DETAILS
- 44mm deep | 30mm wide | 22mm internal
- Hybrid U/V aero profile
- Aero-optimized for 28/30mm tires
- Wide enough to support 40mm+ tires
- Tubeless-ready mid-hook design (compatible with tubed tires)
- 2.5mm offset, angle drilling, & reinforced nipple seat
- Toray 800/700 blend with graphene infused resin
- Max pressure 90psi
- 410g +/- 5%
WHY WE CHOSE IT
An all-arounder that's optimized for 28/30mm slicks yet wide enough to support 40mm knobbies, our U/V Aero-Wide Carbon rims let you take advantage of the improved rolling resistance and comfort of today's more voluminous tubeless performance tires without sacrificing aerodynamics. They feature  2.5mm of offset, angled spoke hole drilling, and a reinforced nipple seat for high and balanced spoke tensions, which in turn create a stiffer, stronger, and more durable wheelset.  Their tubeless mid-hook design improves impact strength and tire stability at low pressures. With a bias toward speed, these rims are ideal for road, cyclocross, gravel, commuting, and speed touring.
DETAILS
- 700c x 30mm
- Supple tubeless-ready casing
- Slick dual compound tread for efficiency and durability
- 335g
WHY WE CHOSE IT
A fast-rolling road slick that isn't afraid of the dirt, WTB's Exposure 30 Road tires employ a supple tubeless-ready casing and a dual-compound tread to offer a great balance of rolling speed and off-pavement capability. Matched to our Aero-Wide Carbon 700C tubeless rims, they're equally suited to all day epics and the the local hammerfest. Run them at 55-90psi depending on weight for optimal performance.
DETAILS
- Famously bombproof "Star Ratchet" upgraded to 36T for 10° engagement
- (4) premium 6902 sealed, large-ball cartridge bearings
- Centerlock rotor interfaces for easy rotor removal/installation when travelling
- 28 hole J-bend flanges
- 12 x 142mm thru-axle (convertible to other standards)
- Shimano Road or SRAM XDR freehub with spacer for Shimano Road or SRAM XD
- 267g
WHY WE CHOSE IT
Extreme loads and environmental stresses make rear hubs notoriously prone to failure. That's why we invested in DT Swiss's rightfully venerated DT350 rear hub. It features the famously strong and durable Star Ratchet engagement system, large 6902 sealed cartridge bearings, tool-less serviceability and convertibility to other axle or freehub standards, and a centerlock interface for easy rotor installation and removal.

This hub is twice as strong and 3-5x more expensive than the traditional pawl-based models some brands employ to reduce cost, and weighs only a few grams more than the under-built models often employed to achieve attention grabbing weights at the expense of durability. We went with the 36T ratchet because it offers 2x the engagement speed of the stock 18T without the durability issues and noise of the 54T.

We've reviewed the testing data, talked to mechanics, and have been abusing DT Star Ratchet hubs ourselves for over 15 years. Whether you're ripping it up on singletrack, touring through some remote wilderness, or simply putting in long miles year after year, these are the hubs you'll want to trust to keep you going.

You can learn more about DT's Star Ratchet engagement system here.
DETAILS
- (2) premium 6802 sealed cartridge bearings
- Centerlock rotor interface
-  28h J-bend flanges
- 12 x 100mm thru-axle
- 136g +/- 5%
WHY WE CHOSE IT
DT350 front hubs are famously durable, serviceable, and adaptable. They also achieve their light weight without resorting to durability-compromising tricks. What do we mean? Just as there are brands that will use failure-prone aluminum nipples to shave grams, there are others who may spec a hub with tiny bearings and a narrow hub shell to achieve an eye-catching weight. However, those small bearings wear out fast, and that narrow shell may not withstand the torsional loads associated with disc brakes.
DETAILS
- Cold forged
- Aero bladed
- Sandvik T302+ stainless (Sweden)
- J-bend
- Single length
- 4.3g each
WHY WE CHOSE IT
Why invest so much on so many fancy bladed spokes? Because the same cold-forging process that turns a length of round straight-gauge wire into a light and aero bladed spoke also improves strength-to-weight and elastication by realigning the grain flow of the metal and reducing its cross-sectional area. The result is a spoke that can be run at high tension while experiencing less change in tension and thus fatigue with each wheel rotation or impact. Furthermore, unlike cheaper round "butted" spokes that are in fact cold-forged in a similar process, bladed spokes can easily be built into a wheel and later trued without inducing spoke wind-up, further extending the life of the wheel. To cap it off, we went with a single length of J-Bend spoke to make it easier to find should one fail, and avoided low spoke counts to make it unlikely one ever will.
DETAILS
- Durable brass
- Resist seizing, splitting, & other failure modes
- Can be trued with tires and rim-tape in place
- 1g each
WHY WE CHOSE IT
Why do mechanics love externally adjustable brass nipples? Aluminum nipples are a trick used by some brands achieve attention-grabbing weights at the expense of durability and serviceability. Aluminum oxidizes and is much softer than brass, making aluminum nipples notoriously prone to seizure, splitting, and failure. The result is that a simple wheel true can turn into a costly rebuild with new nipples and spokes. Weight savings? Less than 18 grams per wheel.

As for the hidden nipples used by some uber expensive brands, no one envies having to remove your tires, sealant, rim tape, and valve stems just to perform necessary maintenance. Aerodynamic advantage? Zero. Zilch. Nada.
DETAILS
- Each wheel is built by a single, skilled professional
- 2-cross lacing for lateral and rotational strength
- 28 spokes for durability and stiffness
WHY WE CHOSE IT
Strong, durable wheels require more than the best components. That's why we invested having our wheels professionally hand-built and machine checked. With a professional touch-up at 1200 miles and regular check-ups for tension and true, our wheels will continue to perform year after year.

 

Have a question? Check out our FAQ or reach out to us directly at support@thesis.bike to talk to a real human. We're always happy to talk bikes.
 

Shop now

 


 

Geometry

 

Need help finding the right size? Check out our sizing guide.

Frame Size XS S M L XL
A Reach 356 363 378 388 403
B Stack 521 551 571 595 614
C Head Tube 110 138 155 180 200
D Effective Top Tube 515 531 547 570 591
E Wheelbase 987 995 1007 1025 1046
F Front-Center 578 586 598 616 637
G Head Tube Angle 70° 71° 72° 72° 72°
H Fork Offset 51
I Fork Axle to Crown 385
J BB Drop 73
K Chain Stay 420
L Seat Tube Angle 73°
M Seat Tube 440 470 500 530 560
Standover (Midpoint of TT) 720 750 775 805 835
Default Handlebar (C-C) 380 400 420 420 440
Default Stem (7°) 80 90 100 100 110
Default Crankarms 165 165 165 170 175
Default Seatpost 350 350 400 400 400
Dropper Seatpost
Default Length | Travel 315 | 70 360 | 90 405 | 110 405 | 110 405 | 110
Default Saddle Height Range 610 - 660 660 - 735 705 - 790 735 - 820 765 - 850
Alternate Length | Travel 360 | 90 315 | 70 360 | 90 360 | 90 360 | 90
Alternate Saddle Height Range 650 - 705 640 - 690 690 - 750 720 - 795 750 - 825


All figures in millimeters unless otherwise indicated.

 


 

What they're saying about the OB1

“I fear I have developed a superiority complex because I see all other bikes, especially the $12,000 bling-bling road bikes, as ridiculous now. The impression I have is that if chased no one would ever catch me because I could just bunny hop over the curb and set off into woods before anyone even knew what happened. This bike screams capability.” - Patrick G.

“Exceeds all expectations. The bike is basically perfect. Smashed a bunch of PRs. Joy = speed it seems. Big smile here.” - Joshua S.

Grab a test ride

 


 

Questions? Schedule a call with us.

Have a question on sizing? Looking for the perfect spec for your terrain? Let us help.

We know finding the right bike can be overwhelming. We'll treat you like a friend and help you find the best bike for your needs, regardless of who makes it.

To get started, schedule a phone call or drop us a note at hello@thesis.bike.

Schedule a call

 


 

Find your perfect ride

THE OB1
Starting at $3299

Our original legendary all-road gravel bike.

Shop now

THE OB1 AXS 1x
Starting at $4999

The best of the OB1, now with electronic AXS 1x.

Shop now

THE OB1 AXS 2x
Starting at $5199

The best of the OB1, now with electronic AXS 2x.


The OB1 The OB1 AXS 1x The OB1 AXS 2x
Starting Price $3,299 $4,999 $5,199
The Gist Our legendary original OB1, with 1x11 mechanical shifting. The best of the original OB1, with 1x12 electronic shifting. The best of the original OB1, with 2x12 electronic shifting.
Wheels
  • Thesis 700C Aero-Wide Carbon
  • Thesis 650B Ultra-Wide Carbon
  • Both wheel packages (+$1399)
  • Thesis 700C Aero-Wide Carbon
  • Thesis 650B Ultra-Wide Carbon
  • Both wheel packages (+$1699)
  • Thesis 700C Aero-Wide Carbon
Dropper Post (+$199) Slickly actuated by front shifter Actuated by separate lever under left hood Actuated by separate lever under left hood
Shifters & Brakes SRAM Rival 22 Hydraulic SRAM Force AXS HRD Electronic/Hydraulic SRAM Force AXS HRD Electronic/Hydraulic
Rear Derailleur SRAM Rival 1 Long Cage Clutched SRAM X01 AXS Eagle 12spd Electronic SRAM Force AXS 12spd Electronic
Front Derailleur -- -- SRAM Force eTap AXS Electronic
Cassette
  • SunRace 11-42T (382% range)
  • SunRace 11-46T (418% range)
  • SRAM Eagle XG-1295 10-50T (500% range)
  • SRAM Force XG-1270 10-33T (460% range)
Chainring
  • Thesis 38T
  • Thesis 40T
  • Thesis 42T
  • Thesis 44T
  • Thesis 46T
  • SRAM 44T
  • SRAM 46/33T
Chain SRAM PC1110 with quick link SRAM GX Eagle with quick link SRAM Force AXS with quick link
Rotors SRAM Centerline Centerlock 160mm SRAM Centerline XR Centerlock 160mm SRAM Centerline XR Centerlock 160mm
Crank Thesis Hollow-Forged AL:
  • 155mm
  • 160mm
  • 165mm
  • 170mm
  • 172.5mm
  • 175mm
SRAM Force Carbon:
  • 165mm
  • 170mm
  • 172.5mm
  • 175mm
SRAM Force Carbon:
  • 165mm
  • 170mm
  • 172.5mm
  • 175mm

 


 

 

Factory-direct

Details matter

Personal one-on-one consults

Ride it & love it:
30-day returns

No bull crash replacement

Invest in community

 

Have a question we didn't answer below? Drop us a note at support@thesis.bike. We're always happy to talk about bikes.

The OB1

Since weights will vary depending on frame size, build and other selections, here are a few examples and their weights:
  • 18.5lbs: Size L, raw black carbon frame, 1 x 11, 11-42T, standard seatpost, 700C wheelset
  • 19.9lbs: Size M, painted frame, 1 x 11, 11-42T, dropper seat post, 650B wheelset
  • 20.0lbs: Size L, raw black carbon frame, 1 x 11, 11-46T, dropper seat post, 650B wheelset

- 2 bottle mounts in the front triangle
- 1 bottle mount below the downtube
- 1 bento mount on the top tube
- 2 bottle mounts on the fork blades
- Front and rear fender mounts (seat stay bridge included)
- Wide central clamping area on handlebar

Note: For optimum performance, load your heaviest items in a frame bag secured in the main triangle.

Max weight of rider + gear: 115kg (254lb)

When your bike shows up on your doorstep, you'll want to install and secure the bars, seatpost, pedals, and wheels, plus checking the tire pressure and making sure the bike is adjusted to fit you perfectly. Check out our setup guide to learn more.

If this isn’t something you’re already super comfortable with, your best option is to take your Thesis to a local professional bicycle mechanic. It’s always good to have a local mechanic on your side; you never know when you’ll need their help.
It's pretty darn easy and takes less than 90 seconds. See our video guide below:

Ordering and Customization

Nope, unfortunately not. We believe the OB1 is amazing in its own right, and that's why we stand behind the full bike.
The OB1 AXS 2x is not compatible with our 650B wheels, due to limited clearance with SRAM’s AXS front derailleur. It has clearance for up to 700C X 40mm tires. However, you can definitely get a second 700c wheelset with gravel tires of your choice if you want the versatility the other two OB1 models offer.
Let’s get you an amazing fit. If you find that you need a different size for your stem, crank, or handlebar, drop us a line at support@thesis.bike and we’ll get you a replacement at a reasonable price.
Nope, that was a limited time offer. But guess what? Our black frame is already primed for custom paint, so you can go wild and be you.
Guess what? Our standard “Black Carbon Matte” finish doubles as a primer for custom paint. We'd love to see what you come up with, so please send us photos. :)
Yes! We offer a version of the Thesis OB1 without the drivetrain so you can use your own. The OB1 is compatible with both 1x and 2x systems. Check out our Bring Your Own Drivetrain page.

Thesis OB1 Maintenance

Short answer: it’s far lower than most people think.

We created the guide below as a starting point for determining ideal tire pressures for your particular body, terrain, and riding style. Off-road, the goal is to run low enough for optimal traction and shock-absorption, but high enough to prevent rim impacts over rough terrain. On road, the goal is to minimize rolling resistance and vibration-induced fatigue.

In both cases, because more of your mass will be distributed over the rear axle, consider running your front tire 5-8% lower for improved traction and comfort.

You’ll may notice that our recommended road pressures are substantially lower than what you may be used to with traditional 23/25/28mm tubed tires. Testing has shown that such wider rim/tire combinations offer superior rolling resistance relative to narrower combos. While running pressures that are slightly lower than our recommendations can improve traction and comfort with little-to-no impact on rolling efficiency, running higher than recommended pressures will reduce efficiency along with traction and comfort.

Yes, but you’ll need a model that doesn’t interfere with the dropper’s operation. Specifically, you’ll want something small and secure that attaches to the saddle rails and not the seatpost itself, and you’ll want to make sure it doesn’t get in the way when the post is fully dropped. Other options for on-bike storage include mounting a bottle cage to the bottom of the downtube for use with a bottle-shaped storage container, mounting a bento to the top of the top tube, or mounting a handlebar bag the bar’s wide central clamping area.

Note that for larger/heavier bikepacking-style seat bags, we recommend using your standard (non-dropper) seatpost.
It is completely normal in the beginning for tubeless tires to slowly leak air while the sealant works its magic. The same thin but robust sidewalls that provide such a smooth and efficient ride also have micro-pores that need to be filled, so it is entirely normal for a bit of sealant to weep through during the sealing process.

The best course of action is to ride. The sealant will foam up as it sloshes around, and riding continuously bathes the sidewalls in sealant in a way that a quick shake and spin during assembly cannot. Just be sure to bring a pump, tube, and 6mm hex wrench (for the thru-axles) just in case, as is good practice for all of your rides.
Dial in your fit with reach adjust. Get more power and control from your SRAM brakes by adjusting them to fit your hands. The adjustment is located between the shift lever blade and the brake lever blade on the underside of the brake lever. Pull back the shift lever to access the 2.5mm hex adjustment screw. When viewed from the bottom, turn the wrench clockwise to move the lever away from the bar and turn the wrench counter-clockwise to move the lever closer to the bar. Once you have your adjustment made, check to make sure that when the brake lever is pulled firmly, it doesn’t bottom out on the handlebar, limiting your braking power.

Levers feel spongy? You may need a re-bleed. While SRAM hydraulic brakes come pre-bled from the factory, the process of cutting and resizing the hoses to route them internally through your bicycle’s frame and fork can introduce enough air to the system to affect brake performance. This is why we recommend re-bleeding each system after installation in our assembly guide. Still having issues after a re-bleed? You may still have air in the system. If the situation doesn’t improve after a few squeezes of the lever, ask your mechanic if another bleed is needed. If bleeding the system yourself, be sure to follow SRAM’s recommended bleed procedure and pay particular attention to how dissolved gasses are removed from the brake fluid (time 0:59).

For more information, check out SRAM’s Road Hydraulic Brake Tips and Tricks.
Clamping a dropper is not recommended and can damage the post. Same is true of hanging a dropper-equipped bike by its seat.
650B x 47mm, which sit almost 50mm wide on our 27.3ID rims. We’ve also run the 48mm Panaracer GravelKing SKs with no issues, though they sit ~51mm and thus have a smidge less than our 4mm of recommended clearance. Because 650Bx47mm tires have the same radius as 700Cx30mm, handling remains constant when swapping wheelsets (except, of course, for differences related to the tires themselves).

700C x 40mm. The 22ID rims are aero-optimized for 28-30mm slicks but offer a wide base of support for running higher volume tires at low pressures without inducing tire squirm. Some 42mm tires will also fit, but we’ve not yet tested them and riders on smaller frames may experience toe overlap issues. Note that clearing larger 700C tires would have required a longer/slacker geometry, thus compromising handling.

Shipping, Returns, and Warranty

Thesis is available to ship to the following countries:

  • Australia
  • Austria
  • Belgium
  • Canada
  • Denmark
  • Finland
  • France
  • Germany
  • Ireland
  • Italy
  • Japan
  • Netherlands
  • Norway
  • Portugal
  • Singapore
  • Spain
  • Sweden
  • Switzerland
  • Taiwan
  • United Kingdom
  • United States
Please note: all purchases are in US currency, and all customers outside the US are responsible for paying their own duties, tariffs, and customs from Taiwan to your destination country prior to delivery. 

We are exploring expansion into other countries. Send a note to support@thesis.bike if you'd like to request for your country to be added to the list.
Each bicycle is built-to-order just for you, and it takes a few weeks. You can find the latest lead time on each product's particular page. Here's how it works, and why it's worth the wait.
Shipping is a flat rate $99 for bicycles and wheels, and $4.99 to $19.99 for other components. At the time of this writing, taxes are only charged for delivery addresses in the state of California.
We're proud of our Ride It and Love It return policy, which lets you ride your bike for 30 days before making a return. Please see our Return Policy for more details.
Yep. Please visit our Warranty page for full details.
Rather than heavily marking up our products and then offering “discounted” crash replacements, we’re proud to give you the same direct pricing at all times. If you need a replacement part not already listed on our website, we’ll do our best to get one to you at a similarly outstanding value. Contact us at support@thesis.bike to get started.
Awesome! For group sales, reach out to us at hello@thesis.bike.
Yes! Once you add an item to your cart, instead of hitting "check out", you will see a PayPal button underneath it. Once you log in to PayPal, it will offer you several options for paying, and at the bottom, you'll see a purple box for PayPal Credit. It offers no interest if paid in full in 6 months. We're working with other vendors for more financing options in the future.


Have a question we haven’t answered yet? Send a note to support@thesis.bike and we'll take care of you.

 


 

Meet the OB1

It's a versatile carbon gravel all-road bike for road, gravel, bikepacking -- or all of the above.

Meet the OB1

 

Return Policy | No Bull Crash Replacement | Warranty


We’re in this together.

We care deeply about your ride experience. Honesty, integrity, and fairness are core to our thesis, and we strive to live by the adage of “treat others the way you want to be treated”.

That being said, we’re all human, and we may not always get it right. If that happens, we promise to do our best to make it right.

Whenever you have questions or issues, feel free to reach out to us at support@thesis.bike. Let’s figure this out together.

- Randall and Alice, Co-Founders of Thesis


Ride It and Love It: 30 Day Return Policy

We want you to love your bike. That's why we offer one of the best return policies of any bike brand out there. Ride your bike, love your bike, or return it within 30 days of delivery for a full refund minus the cost of shipping.

You may return like-new products purchased from us within 30 days of delivery for a full refund minus the cost of shipping. The following terms apply to each such return:

  • Products must be in like-new condition. Products that were damaged after arriving at your doorstep are not eligible for refunds, though we invite you to contact us about crash replacement options.
  • We ask you to cover the cost of shipping and packaging. Tip: hang on to the box your bike came in; it doubles as a good travel box anywhere you go.
  • If your product was damaged in transit before you received it, you have 7 days from time of receipt to inform us of any damage.
  • We do not accept returns on modified products or products ordered with custom paint.

To start the process for a return, please contact us at support@thesis.bike. Please make sure you have written confirmation from us before shipping any return packages.

 


No-Bull Crash Replacement

Rather than heavily marking up our products and then offering “discounted” crash replacements, we’re proud to give you the same direct pricing at all times. If you need a replacement part not already listed on our website, we’ll do our best to get one to you at a similarly outstanding value. Contact us at support@thesis.bike to get started.

 


Warranty

ACKNOWLEDGMENT OF ASSEMBLY RESPONSIBILITY
Your Thesis bike was delivered to your shipping address 85% assembled. By purchasing a Thesis bicycle, you understand it is 85% assembled and that improper assembly can result in product damage or failure that may lead to injury or death. You agree to follow instructions to assemble the last 10% before riding, or else to take your bike to a qualified professional mechanic for assistance. You further agree not to hold Thesis liable for any damages resulting from assembly.

COVERAGE
Every bike purchased from Thesis is covered under our limited warranty program. The program grants a five (5) year limited warranty for the frame and fork, starting from the date of purchase, for the original purchaser against manufacturing and/or workmanship defects under normal and intended use.The program grants a two (2) year limited warranty for all other components, starting from the date of purchase, for the original purchaser against manufacturing and/or workmanship defects under normal and intended use.

Certain components may have limited warranties of their own that are offered by the component manufacturer, in which case we will refer you to the component manufacturer for service.

If a valid claim is received within the warranty period, Thesis will choose to either repair the product at no charge, using new or refurbished replacement parts; or replace the product or part with a new one that is at least functionally equivalent to the original product. The original of any product or component that is replaced under warranty must be returned to Thesis and becomes Thesis property.

For warranty service or questions, please contact Thesis at support@thesis.bike. Do not return your bicycle to Thesis without first speaking with our staff and obtaining a written return authorization. Please have your receipt or proof of purchase ready. You are responsible for the cost of shipping warranty returns to Thesis and return shipping to your address.

Non-covered events in the warranty include, but are not limited to:

  • improper assembly;
  • paint damage, fading or changes in color;
  • crashes, misuse, or neglect;
  • normal wear and tear;
  • modifications to frame, fork, or components;
  • mounting and alteration of additional components that were not expressly approved by us or replacement of our original components by components that do not have a similar quality;
  • improper use;
  • or excessive load.

The Thesis limited warranty does not include consumables or normal wear and tear parts, such as chain, cables, bar tape, chainrings, cassettes, pulley wheels, bearings, gears cables, tires, saddle covering, and brake pads.

SHIPPING DAMAGE CLAIMS
Please immediately inspect your product(s) for damage. We will not accept shipping damage claims later than 7 days from receipt of product. Take pictures of any damage that is found, and date the images when possible. Keep all packaging and paperwork until the inspection process is complete. Please contact support@thesis.bike to get started.

ADDITIONAL TERMS
The Thesis limited warranty as stated in this document provides the sole and exclusive remedy in lieu of all other of all other rights and remedies, including but not limited to implied warranties, contract rights, tort, negligence, strict liability, and other remedies expressed or implied at law or in equity. In no event shall Thesis be liable for special, indirect, incidental, economic or consequential damages, loss or damage to property other than the product itself, loss of use of property, loss of profits, business interruption, punitive damages, contribution, indemnification, or other losses, whatever the cause, including the fault or negligence of Thesis. If any part of this Limited Warranty is deemed to be not legal or enforceable, the remainder shall be given full force and effect.

CLAIMS TO BE RESOLVED BY ARBITRATION / WAIVER OF CLASS ACTION AND JURY TRIAL
If you have a claim against us, you agree that it will be resolved by binding arbitration brought before a single, neutral arbitrator in the State of California, County of San Francisco. Without your agreement to binding arbitration, we would be unable to provide our products and services to you on the same terms. Your agreement to binding arbitration means that you give up your right to sue us in a court of law, except that you may bring a claim in small claims court if your claim qualifies to be heard there. Any arbitration will be conducted and governed by the California Arbitration Act. You also agree not to bring a class action suit against us, and we each waive any right to a jury trial in any dispute. The above does not preclude any party from bringing an action to such equitable relief, if that is the only available appropriate relief under the circumstances.

BY ACCEPTING THESE TERMS, YOU ACKNOWLEDGE AND AGREE THAT YOU ARE WAIVING YOUR RIGHT TO A JURY TRIAL AND ANY RIGHTS YOU MAY HAVE TO BRING ANY CLAIMS ON A CLASS OR REPRESENTATIVE ACTION BASIS.

APPLICABLE LAW
The laws of the State of California and federal law, to the extent applicable, govern the use of the Sites and these Legal Notices without reference to choice of law provisions. Any claim which qualifies to be filed in a court of law will be heard exclusively in the state or federal courts located in the State of California, County of San Francisco.