2020 Specialized Bicycles Sirrus Single Speed M
Build
700C/29 in × 30 mm
Insights
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 592mm |
| Reach | 400mm |
| Stack to Reach Ratio | 1.48:1 |
| Seat Tube Length, Unknown | 470mm |
| Top Tube Length, Effective/Horizontal Center | 575mm |
| Top Tube Slope | 14.8deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 159mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 271mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 434.4mm |
| Front-Center | 638mm |
| Front-Center Horizontal | 633.6mm |
| Wheelbase | 1068mm |
| Fork Offset/Rake | 51mm |
| Fork Length, Unknown | 410mm |
| Trail | 63.5mm mid/neutral |
| Mechanical Trail | 60mm |
| Wheel Flop | 19.5mm |
| Standover Height | 775mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 127mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 101mm |
Single Speed Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 30mm |
| Tire Outer Diameter | 682mm |
| Bike Length with Tires | 1750mm |
| Crank Length | 170mm |
| Handlebar Width | 580mm |
| Stem Length | 75mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Aluminum |
| Fork Material | Steel |
| Brake Type | Rim |
Source:https://www.specialized.com/us/en/sirrus-single-speed-mens-spec/p/173615?color=271962-173615&searchText=90919-7704