Bike-on-Bike
Default Config
Default Config
Insights
Somewhat upright stack and reach vs trend of track/fixed-gear bikes
Design deviates from other sizes of Surly Bikes Steamroller
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Surly Bikes Midnight Special
Geometry
Stack | 558.8mm | 580mm +21.2mm |
Reach | 402.3mm | 393mm -9.3mm |
Stack to Reach Ratio | 1.39:1 | 1.48:1 |
Seat Tube Length, C-TTT | — | 560mm |
Seat Tube Length, Unknown | 560mm | — |
Top Tube Length, Effective/Horizontal Center | 568mm | — |
Top Tube Length, Effective/Horizontal HT Top | — | 570mm |
Top Tube Length, Actual C-C | 568mm | 564mm -4mm |
Top Tube Slope | 0deg | 2.6deg +2.6deg |
Head Tube Angle | 73.5deg | 73deg -0.5deg |
Seat Tube Angle | 73.5deg | 73deg -0.5deg |
Head Tube Length | 136mm | 140mm +4mm |
Bottom Bracket Drop | 70mm | 65mm -5mm |
Bottom Bracket Height | 279mm | 274mm -5mm |
Chainstay Length | 398mm | 425mm +27mm |
Chainstay Length Horizontal | 391.8mm | 420mm +28.2mm |
Front-Center | 591mm | 595.6mm +4.6mm |
Front-Center Horizontal | 586.8mm | 592mm +5.2mm |
Wheelbase | 978.6mm | 1012mm +33.4mm |
Fork Offset/Rake | 38mm | 40mm +2mm |
Fork Length (Axle-To-Crown) | 375mm | 400mm +25mm |
Trail | 63.8mm mid/neutral | 61.8mm -2mm mid/neutral |
Mechanical Trail | 61.1mm | 59.1mm -2mm |
Wheel Flop | 17.4mm | 17.3mm -0.1mm |
Standover Height | 815.9mm | 827mm +11.1mm |
Tire to Pedal Spindle | 72mm 170 mm cranks | 81.6mm +9.6mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 109mm 170 mm cranks | 99mm -10mm 175 mm cranks |
Build
Wheel Size | 700C/29 in 622 mm BSD | 650B/27.5 in 584 mm BSD |
Tire Width | 38mm | 47mm +9mm |
Tire Outer Diameter | 698mm | 678mm -20mm |
Bike Length with Tires | 1676.6mm | 1690mm +13.4mm |
Crank Length | — | 175mm |
Handlebar Width | — | 440mm |
Stem Length | — | 100mm |
Stem Angle | — | 6deg |
| Suspension Type | Rigid, non-suspension corrected | Rigid, non-suspension corrected |
| Bar Type | Drop Bar | Drop Bar |
| Frame Material | Steel | Steel |
| Fork Material | Steel | Steel |
| Brake Type | Rim | Disc |
| Features | Single-speed capable | — |
Meta
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| Source | https://surlybikes.com/bikes/steamroller | https://surlybikes.com/bikes/midnight_special |
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