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 The OB1 AXS 1x
Starting Price $3,299 $4,999
The Gist Our legendary original OB1, with 1x11 mechanical shifting. The best of the original OB1, with 1x12 electronic shifting.
Wheels
  • Thesis 700C Aero-Wide Carbon
  • Thesis 650B Ultra-Wide Carbon
  • Both wheel packages (+$1199)
  • Thesis 700C Aero-Wide Carbon
  • Thesis 650B Ultra-Wide Carbon
  • Both wheel packages (+$1599)
Dropper Post (+$149) Slickly actuated by front shifter Actuated by separate lever under left hood
Shifters & Brakes SRAM Rival 22 Hydraulic SRAM Force AXS HRD Electronic/Hydraulic
Rear Derailleur SRAM Rival 1 Long Cage Clutched SRAM X01 AXS Eagle 12spd Electronic
Front Derailleur -- --
Cassette
  • SunRace 11-42T (382% range)
  • SunRace 11-46T (418% range)
  • SRAM Eagle XG-1295 10-50T (500% range)
Chainring
  • Thesis 38T
  • Thesis 40T
  • Thesis 42T
  • Thesis 44T
  • Thesis 46T
  • SRAM 44T
Chain SRAM PC1110 with quick link SRAM GX Eagle with quick link
Rotors SRAM Centerline 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

 


 

Questions? Don't hesitate to reach out.

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, drop us a note at hello@thesis.bike.

Email Us