2023 Surly Bikes Big Dummy Base MD

Build

26 in × 2.5 in

Insights

Average stack and reach vs trend of cargo bikes

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
599.3mm
Reach
431.1mm
Stack to Reach Ratio
1.39:1
Seat Tube Length, C-TTT
432mm
Top Tube Length, Effective/Horizontal HT Top
620mm
Top Tube Slope
16.5deg
Head Tube Angle
70deg
Seat Tube Angle
72.5deg
Head Tube Length
180mm
Bottom Bracket Drop
40mm
Bottom Bracket Height
303mm
Chainstay Length
821mm
Chainstay Length Horizontal
820mm
Front-Center
681.6mm
Front-Center Horizontal
680.4mm
Wheelbase
1500.4mm
Fork Offset/Rake
43mm
Fork Length (Axle-To-Crown)
417.8mm
Trail
79.1mm
high
Mechanical Trail
74.3mm
Wheel Flop
25.4mm
Standover Height
773mm
Tire to Pedal Spindle Distance
With 175 mm cranks
163.6mm
Pedal Spindle to Ground Clearance
With 175 mm cranks
128mm

Base Build

Wheel Size
26 inch (559mm BSD)
Tire Width
2.5in
Tire Outer Diameter
686mm
Bike Length with Tires
2186.4mm
Crank Length
175mm
Handlebar Width
735mm
Stem Length
70mm
Stem Angle
7deg
Suspension Type
Rigid, suspension corrected
Bar Type
Flat Bar
Frame Material
Steel
Fork Material
Steel
Brake Type
Disc

Published Sizing Recommendations

Height
139 ft 8 in
to
152 ft 5 in
Source:https://surlybikes.com/bikes/big_dummy#spec-geo