2021 v.3 Disc Soma Fabrications Grand Randonneur Base 55

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
571mm
Reach
391mm
Stack to Reach Ratio
1.46:1
Seat Tube Length, C-T
550mm
Top Tube Length, Effective/Horizontal Center
560mm
Top Tube Slope
4.6deg
Head Tube Angle
72.5deg
Seat Tube Angle
73.5deg
Head Tube Length
165mm
Bottom Bracket Drop
65mm
Bottom Bracket Height
269mm
Chainstay Length
430mm
Chainstay Length Horizontal
425.1mm
Front-Center
622mm
Front-Center Horizontal
617.9mm
Wheelbase
1043mm
Fork Offset/Rake
65mm
Trail
37.2mm
low
Mechanical Trail
35.4mm
Wheel Flop
10.7mm
Standover Height
789.9mm
Tire to Pedal Spindle Distance
With 170 mm cranks
118mm
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
1711mm
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