2020 Specialized Bicycles Sirrus Single Speed S
Build
700C/29 in × 30 mm
Insights
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Specialized Bicycles Sirrus
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 564mm |
| Reach | 388mm |
| Stack to Reach Ratio | 1.45:1 |
| Seat Tube Length, Unknown | 430mm |
| Top Tube Length, Effective/Horizontal Center | 555mm |
| Top Tube Slope | 16.6deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 133mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 271mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 434.4mm |
| Front-Center | 626mm |
| Front-Center Horizontal | 621.6mm |
| Wheelbase | 1056mm |
| Fork Offset/Rake | 51mm |
| Fork Length, Unknown | 410mm |
| Trail | 69.8mm high |
| Mechanical Trail | 65.6mm |
| Wheel Flop | 22.5mm |
| Standover Height | 735mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 115mm |
| 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 | 1738mm |
| 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