2021 Thesis Bike OB1 Base (650B) XL

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
614mm
Reach
403mm
Stack to Reach Ratio
1.52:1
Seat Tube Length, C-T
560mm
Top Tube Length, Effective/Horizontal HT Top
591mm
Top Tube Slope
7.9deg
Head Tube Angle
72deg
Seat Tube Angle
73deg
Head Tube Length
200mm
Bottom Bracket Drop
73mm
Bottom Bracket Height
266mm
Chainstay Length
420mm
Chainstay Length Horizontal
413.6mm
Front-Center
637mm
Front-Center Horizontal
632.4mm
Wheelbase
1046mm
Fork Offset/Rake
51mm
Fork Length (On-Axis)
385mm
Trail
56.5mm
mid/​neutral
Mechanical Trail
53.8mm
Wheel Flop
16.6mm
Standover Height
835mm
Tire to Pedal Spindle Distance
With 175 mm cranks
123mm
Pedal Spindle to Ground Clearance
With 175 mm cranks
91mm

Base (650B) Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
47mm
Tire Outer Diameter
678mm
Bike Length with Tires
1724mm
Crank Length
175mm
Handlebar Width
440mm
Stem Length
110mm
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
6 ft 1 in
to
6 ft 5 in
Source:https://thesis.bike/products/the-ob1-original