2026 Specialized Bicycles Sirrus 4.0 XS
Build
700C/29 in × 32 mm
Stack and Reach vs. Category Trend
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Geometry
| Stack | 590mm |
| Reach | 371mm |
| Stack to Reach Ratio | 1.59:1 |
| Seat Tube Length, Effective Center | 395mm |
| Top Tube Length, Effective/Horizontal HT Top | 549mm |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 125mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 273mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 434.4mm |
| Front-Center | 618mm |
| Front-Center Horizontal | 614.6mm |
| Wheelbase | 1049mm |
| Fork Offset/Rake | 51mm |
| Fork Length, Unknown | 395mm |
| Trail | 70.6mm high |
| Mechanical Trail | 66.3mm |
| Wheel Flop | 22.7mm |
| Standover Height | 722mm |
| Tire to Pedal Spindle Distance With 165 mm cranks | 110mm |
| Pedal Spindle to Ground Clearance With 165 mm cranks | 108mm |
4.0 Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 32mm |
| Tire Outer Diameter | 686mm |
| Bike Length with Tires | 1735mm |
| Crank Length | 165mm |
| Handlebar Width | 580mm |
| Stem Length | 70mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Aluminum |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:www.specialized.com