2021 Thesis Bike OB1 Base (650B) M

Build

650B/27.5 in × 47 mm

Insights

Average stack and reach vs trend of all-road/gravel bikes

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
571mm
Reach
378mm
Stack to Reach Ratio
1.51:1
Seat Tube Length, C-T
500mm
Top Tube Length, Effective/Horizontal HT Top
547mm
Top Tube Slope
10deg
Head Tube Angle
72deg
Seat Tube Angle
73deg
Head Tube Length
155mm
Bottom Bracket Drop
73mm
Bottom Bracket Height
266mm
Chainstay Length
420mm
Chainstay Length Horizontal
413.6mm
Front-Center
598mm
Front-Center Horizontal
593.4mm
Wheelbase
1007mm
Fork Offset/Rake
51mm
Fork Length (On-Axis)
385mm
Trail
56.5mm
mid/​neutral
Mechanical Trail
53.8mm
Wheel Flop
16.6mm
Standover Height
775mm
Tire to Pedal Spindle Distance
With 165 mm cranks
94mm
Pedal Spindle to Ground Clearance
With 165 mm cranks
101mm

Base (650B) Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
47mm
Tire Outer Diameter
678mm
Bike Length with Tires
1685mm
Crank Length
165mm
Handlebar Width
420mm
Stem Length
100mm
Stem Angle
7deg
Suspension Type
Rigid, non-suspension corrected
Bar Type
Drop Bar
Frame Material
Carbon/Composite
Fork Material
Carbon/Composite
Brake Type
Disc

Published Sizing Recommendations

Height
5 ft 6 in
to
5 ft 11 in
Source:https://thesis.bike/products/the-ob1-original