2023 Surly Bikes Preamble Flat Bar SM

Build

650B/27.5 in × 1.35 in

Insights

Average stack and reach vs trend of commuter bikes
Design deviates from other sizes of Surly Bikes Preamble

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
535mm
Reach
381mm
Stack to Reach Ratio
1.4:1
Seat Tube Length, Unknown
505mm
Top Tube Length, Actual C-C
545mm
Top Tube Slope
5.6deg
Head Tube Angle
71deg
Seat Tube Angle
73deg
Head Tube Length
135mm
Bottom Bracket Drop
54mm
Bottom Bracket Height
272.3mm
Chainstay Length
420mm
Chainstay Length Horizontal
416.5mm
Front-Center
598.9mm
Front-Center Horizontal
596.5mm
Wheelbase
1013mm
Fork Offset/Rake
47mm
Fork Length (On-Axis)
380mm
Trail
62.6mm
mid/​neutral
Mechanical Trail
59.2mm
Wheel Flop
19.3mm
Standover Height
776mm
Tire to Pedal Spindle Distance
With 170 mm cranks
102.6mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
102.3mm

Flat Bar Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
1.35in
Tire Outer Diameter
652.6mm
Bike Length with Tires
1665.6mm
Crank Length
170mm
Handlebar Width
400mm
Stem Length
80mm
Stem Angle
7deg
Suspension Type
Rigid, non-suspension corrected
Bar Type
Flat Bar
Frame Material
Steel
Fork Material
Steel
Brake Type
Disc

Published Sizing Recommendations

Height
135 ft 5.599999999999909 in
to
Source:https://surlybikes.com/bikes/preamble