2020 Thesis

The OB1 AXS 2x — 650b

A carbon frame gravel bike with high-end components and hydraulic disc brakes.
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MSRP$5,199
FrameCarbon
SuspensionRigid
ForkCarbon
Wheels650b Aluminum
Drivetrain2 × 12 Electronic
GroupsetForce eTap, SRAM
BrakesHydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
The OB1 AXS 2x — 650b
Other Gravel bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

38 mph

The OB1 AXS 2x — 650b

36 mph

Similar Bikes

Highest gear

(descending)

Sizing
XS

5'0" – 5'5"

SM

5'4" – 5'8"

MD

5'5" – 5'11"

LG

5'10" – 6'3"

XL

6'0" – 6'6"

Rider Fit Notes

None yet.

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Reviews
Bikerumor
Thesis delivers big BringAFriend savings, plus new look for OB1 carbon gravel bike

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...

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Cycling Tips
Thesis OB1 long-term review: Good performance, lots of custom options - CyclingTips

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 […]

Highs
  • Good geometry, great spec, outstanding value

Lows
  • Average frame, value equation is region-dependent

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CX Magazine
Bike Review: Thesis OB1 Carbon All-Road Bike

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?

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Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
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

TypeRigid

Groupset
Rear Derailleur

SRAM Force AXS 12spd Electronic

Front Derailleur

SRAM Force eTap AXS Electronic

Crank

SRAM 46/33T

Shifters

SRAM Force AXS HRD Electronic/Hydraulic

Cassette

SRAM Force XG-1270 10-33T 12spd

Chain

SRAM Force AXS

Brakes

SRAM Force AXS HRD Electronic/Hydraulic

TypeHydraulic Disc

Wheels
Rims

Hand-Built

Spokes

Pillar PSR X-TRA 1420 Cold-Forged Bladed

Front Hub

DT Swiss DT350

Rear Hub

DT Swiss DT350

Disc Rotors

SRAM Centerline XR Centerlock 160mm

Rider Notes
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Last updated March 2