The OB1

The Thesis OB1 is a carbon all-road gravel bike made for perfect asphalt to rocky trails and everything in between. It's fast, versatile, brilliantly equipped, and built to last.
Combine that with our factory-direct pricing, and you’ll understand why it’s been called “unbeatable”.

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.

Shop now

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

 


 

Questions? Schedule a call with us.

Have a question on fit? Need help choosing the right build kit or configuration for how you ride? Let us help. 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.

Book a consultation