2020 Thesis
The OB1 — 650b
A carbon frame gravel bike with upper mid-range components and hydraulic disc brakes.
Compare the full range
Manufacturer Price
$3,299| Frame | Carbon |
|---|---|
| Suspension | Rigid |
| Fork | Carbon |
| Wheels | 650b Carbon |
| Drivetrain | 1 × 11 |
| Groupset | Rival |
| Brakes | Hydraulic Disc |
For This Bike
5'0" – 5'5"
5'4" – 5'8"
5'5" – 5'11"
5'10" – 6'3"
6'0" – 6'6"
None yet.
Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.
Jul 2020
Thesis BringAFriend program helps you & a friend get on a new custom-built OB1 carbon gravel bike, saving you both $300 - now in olive green or plum...
Aug 2019 · James Huang
The Thesis OB1 isn’t flashy, and the upstart brand name carries no prestige. It’s not particularly light, it definitely isn’t aero, and in fact, there’s not a ton about it on paper that will blow anyone’s doors off in general. But it’s a very good bike nonetheless, and wonderfully versatile in terms of what you […]
Good geometry, great spec, outstanding value
Average frame, value equation is region-dependent
Apr 2019 · Clifford Lee
The Thesis OB1 is a carbon all-road bike that fits wide 650b and skinny 700c tires. Is it ready to do it all and help reduce the number of bikes you need?
| Frame | Thesis OB1 Carbon |
|---|---|
| Fork | Thesis OB1 Carbon with SteerSafe |
| Bottom Bracket | Thesis 2-Piece Aluminum Interlocking |
| Headset | Thesis Oversized Integrated |
| Stem | Thesis Ultralight |
| Handlebar | Thesis Compact Ergo Flare |
| Saddle | Thesis Endurance 148 Saddle |
| Seatpost | Thesis Ultralight 3D Forged ⸱ 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 Type: Rigid |
| Rear Derailleur | SRAM Rival 1 Long Cage Clutched |
|---|---|
| Crank | Thesis Narrow-Wide Direct Mount Single |
| Shifters | SRAM Rival 22 Hydraulic |
| Cassette | SunRace Ultra Wide Range, e*thirteen TRS Plus, SRAM XG-1150 |
| Chain | SRAM PC1110 with Quick Link |
| Brakes | SRAM Rival 22 Hydraulic Type: Hydraulic Disc |
| Rims | Thesis Ultra-Wide Carbon 650B ⸱ 650B | 27.4mm internal | 33mm wide | 24.5mm deep ⸱ Optimized for 47mm+ tires ⸱ Tubeless-ready hookless design, also compatible with standard tubed tires ⸱ 3mm offset, angle drilling, & reinforced nipple seat ⸱ Toray 700/800 construction ⸱ 370g +/- 5% |
|---|---|
| Spokes | Pillar PSR X-TRA 1420 Cold-Forged Bladed |
| Front Hub | DT Swiss DT350 |
| Rear Hub | DT Swiss DT350 |
| Tires | WTB 650B Venture ⸱ WTB Venture 650B x 47mm (555g) ⸱ Supple tanwall casings ⸱ Tubeless |
| Disc Rotors | SRAM Centerline Centerlock 160mm |
Last updated March 2