2021 v.3 Disc Soma Fabrications Grand Randonneur Base 61

Build

650B/27.5 in × 42 mm

Insights

Average stack and reach vs trend of low-trail bikes

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
612mm
Reach
399mm
Stack to Reach Ratio
1.53:1
Seat Tube Length, C-T
610mm
Top Tube Length, Effective/Horizontal Center
591mm
Top Tube Slope
3deg
Head Tube Angle
73deg
Seat Tube Angle
72.5deg
Head Tube Length
205mm
Bottom Bracket Drop
65mm
Bottom Bracket Height
269mm
Chainstay Length
430mm
Chainstay Length Horizontal
425.1mm
Front-Center
637mm
Front-Center Horizontal
633.9mm
Wheelbase
1059mm
Fork Offset/Rake
65mm
Trail
34.1mm
low
Mechanical Trail
32.7mm
Wheel Flop
9.6mm
Standover Height
844.6mm
Tire to Pedal Spindle Distance
With 170 mm cranks
133mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
99mm

Base Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
42mm
Tire Outer Diameter
668mm
Bike Length with Tires
1727mm
Suspension Type
Rigid, non-suspension corrected
Bar Type
Drop Bar
Frame Material
Steel
Fork Material
Steel
Brake Type
Disc
Source:https://www.somafab.com/archives/product/grand-randonneur-frame-set