2021 v.3 Disc Soma Fabrications Grand Randonneur Base 65

Build

650B/27.5 in × 42 mm

Insights

Somewhat upright stack and reach vs trend of low-trail bikes

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
650mm
Reach
406mm
Stack to Reach Ratio
1.6:1
Seat Tube Length, C-T
650mm
Top Tube Length, Effective/Horizontal Center
610mm
Top Tube Slope
2.9deg
Head Tube Angle
73deg
Seat Tube Angle
72.5deg
Head Tube Length
245mm
Bottom Bracket Drop
65mm
Bottom Bracket Height
269mm
Chainstay Length
430mm
Chainstay Length Horizontal
425.1mm
Front-Center
656mm
Front-Center Horizontal
652.9mm
Wheelbase
1078mm
Fork Offset/Rake
65mm
Trail
34.1mm
low
Mechanical Trail
32.7mm
Wheel Flop
9.6mm
Standover Height
881.4mm
Tire to Pedal Spindle Distance
With 170 mm cranks
152mm
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
1746mm
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