2021 Specialized Bicycles Sirrus X 4.0 S
Build
700C/29 in × 38 mm
Stack and Reach vs. Category Trend
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Geometry
| Stack | 606mm |
| Reach | 376mm |
| Stack to Reach Ratio | 1.61:1 |
| Seat Tube Length, C-T | 440mm |
| Top Tube Length, Effective/Horizontal Center | 559mm |
| Top Tube Slope | 20.2deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 143mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 279mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 434.4mm |
| Front-Center | 629mm |
| Front-Center Horizontal | 625.6mm |
| Wheelbase | 1060mm |
| Fork Offset/Rake | 51mm |
| Fork Length (Axle-To-Crown) | 395mm |
| Trail | 72.8mm high |
| Mechanical Trail | 68.4mm |
| Wheel Flop | 23.4mm |
| Standover Height | 750mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 110mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 109mm |
X 4.0 Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 38mm |
| Tire Outer Diameter | 698mm |
| Bike Length with Tires | 1758mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Aluminum |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://www.specializedconceptstore.co.uk/product/18823/2021-sirrus-x-4-0/