Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Carbon -
Wheels 650b -
Groupset Rival 1, Rival 22 -
Suspension Rigid -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
XS
156cm - 166cm
SM
163cm - 174cm
MD
171cm - 182cm
LG
179cm - 189cm
XL
185cm - 195cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Thesis OB1 Carbon
Suspension Fork
Thesis OB1 Carbon with SteerSafe
Drivetrain
Rear Derailleur
SRAM Rival 1 Long Cage Clutched
Shift Levers
SRAM Rival 22 Hydraulic
Cassette
SunRace Ultra Wide Range, e*thirteen TRS Plus, SRAM XG-1150
Crank
Thesis Narrow-Wide Direct Mount Single
Bottom Bracket
Thesis 2-Piece Aluminum Interlocking
Chain
SRAM PC1110 with Quick Link
Wheels
Front Hub
DT Swiss DT350
Rear Hub
DT Swiss DT350
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
Tires
WTB 650B Venture ? WTB Venture 650B x 47mm (555g) ? Supple tanwall casings ? Tubeless
Brakes
Brakes
SRAM Rival 22 Hydraulic
Disk Rotors
SRAM Centerline Centerlock 160mm
Cockpit
Stem
Thesis Ultralight
Handlebar
Thesis Compact Ergo Flare
Headset
Thesis Oversized Integrated
Seat
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
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | XS | SM | MD | LG | XL |
|---|---|---|---|---|---|
| Stack Reach Ratio | 1.46 mm | 1.51 mm | 1.5 mm | 1.53 mm | 1.52 mm |
| Front Center | 578 mm | 586 mm | 598 mm | 616 mm | 637 mm |
| Rake | 51 mm | 51 mm | 51 mm | 51 mm | 51 mm |
| Trail | 66 mm | 60 mm | 54 mm | 54 mm | 54 mm |
| Stack | 527 mm | 557 mm | 577 mm | 601 mm | 620 mm |
| Reach | 362 mm | 369 mm | 384 mm | 394 mm | 409 mm |
| Top Tube Length | 521 mm | 537 mm | 553 mm | 576 mm | 597 mm |
| Seat Tube Angle | 73 ° | 73 ° | 73 ° | 73 ° | 73 ° |
| Seat Tube Length | 440 mm | 470 mm | 500 mm | 530 mm | 560 mm |
| Head Tube Angle | 70 ° | 71 ° | 72 ° | 72 ° | 72 ° |
| Head Tube Length | 110 mm | 138 mm | 155 mm | 180 mm | 200 mm |
| Chainstay Length | 426 mm | 426 mm | 426 mm | 426 mm | 426 mm |
| Wheelbase | 993 mm | 1001 mm | 1013 mm | 1031 mm | 1052 mm |
| Bottom Bracket Drop | 73 mm | 73 mm | 73 mm | 73 mm | 73 mm |
| Standover Height | 726 mm | 756 mm | 781 mm | 811 mm | 841 mm |
| Wheels | 650 | 650 | 650 | 650 | 650 |
| Rider Min Height | 156 cm | 163 cm | 171 cm | 179 cm | 185 cm |
| Rider Max Height | 166 cm | 174 cm | 182 cm | 189 cm | 195 cm |
About this model
The OB1 — 650b is a Thesis Ob1 model. 6 bikes variations carry this model name so far. Check out the entire range from 2020 of this model, by clicking this link.
Model range prices
The most economical model, the Thesis The OB1 — 650b 2020 has a starting price of 3299$. Thesis The OB1 AXS 2x — 650b 2020 on the other hand is the most expensive at 5199$.
Safety
When you go for a ride, don’t forget to put your helmet on. Moreover, ride with traffic, not against it. This will help you stay visible to drivers and also makes it easier for them to see you.
Average price for Gravel bikes
According to our math, the average price for a trustworthy Gravel bike is 2462$. However, even if your budget is less than the average, you might still be able to get a top-quality Gravel bike. In short, before purchasing your ideal bike do some research about its components, and also check for reviews online.
At the moment of the release date, Thesis The OB1 — 650b price was 3299$. Comparing the average cost of a Gravel bike to this one, you will see that The OB1 — 650b price is 34% higher.
Overview of components
Fork material
The OB1 — 650b has a carbon fork, so, it is super light and stiff. In conclusion, a carbon fork gives you great control when steering, and is also more forgiving.
Wheels size
When leaving the production line, the The OB1 — 650b model has carbon wheels. After 700c wheels, 650b is the second most popular choice for road bikes. However, if you want higher speeds, you should look for a bike with 700c wheels.
Brakes
When you want to stop the bike in time, the brakes are vital. The The OB1 — 650b has Hydraulic Disc brakes. These kinds of brakes are among the most popular models used on bikes. To sum up, these are ideal for anyone.
Sizes
This bike is available in 5 sizes. They vary from 156 cm – 195 cm (5.12 ft – 6.4 ft). In conclusion, it won’t take much to find one that’s right for you.