2013 v.1 Soma Fabrications Grand Randonneur Base 55

Build

650B/27.5 in × 32 mm

Insights

Very aggressive stack and reach vs trend of low-trail bikes

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
549mm
Reach
397mm
Stack to Reach Ratio
1.38:1
Seat Tube Length, C-T
550mm
Top Tube Length, Effective/Horizontal Center
560mm
Top Tube Slope
2.2deg
Head Tube Angle
72.5deg
Seat Tube Angle
73.5deg
Head Tube Length
150mm
Bottom Bracket Drop
65mm
Bottom Bracket Height
259mm
Chainstay Length
425mm
Chainstay Length Horizontal
420mm
Front-Center
625mm
Front-Center Horizontal
622mm
Wheelbase
1042mm
Fork Offset/Rake
69mm
Trail
29.8mm
very low
Mechanical Trail
28.4mm
Wheel Flop
8.6mm
Standover Height
766mm
Tire to Pedal Spindle Distance
With 170 mm cranks
131mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
89mm

Base Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
32mm
Tire Outer Diameter
648mm
Bike Length with Tires
1690mm
Suspension Type
Rigid, non-suspension corrected
Bar Type
Drop Bar
Frame Material
Steel
Fork Material
Steel
Brake Type
Rim
Source:http://somafab.blogspot.com/2013/06/soma-grand-randonneur-official-geometry.html