2023 Surly Bikes Preamble Flat Bar SM
Build
650B/27.5 in × 1.35 in
Insights
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