Bike-on-Bike
Default Config
Default Config
Insights
Design deviates from other sizes of Specialized Bicycles Sirrus
Somewhat aggressive stack and reach vs trend of hardtail cross-country mtb bikes
Design deviates from other sizes of Specialized Chisel
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Geometry
Stack | 635mm | 605mm -30mm |
Reach | 382mm | 430mm +48mm |
Stack to Reach Ratio | 1.66:1 | 1.41:1 |
Seat Tube Length, C-T | 470mm | — |
Seat Tube Length, Unknown | — | 430mm |
Top Tube Length, Effective/Horizontal Center | 573mm | 603mm +30mm |
Top Tube Slope | 19.7deg | 19.3deg -0.4deg |
Head Tube Angle | 71deg | 68deg -3deg |
Seat Tube Angle | 73.5deg | 74deg +0.5deg |
Head Tube Length | 169mm | 95mm -74mm |
Bottom Bracket Drop | 70mm | 63mm -7mm |
Bottom Bracket Height | 279mm | 307.7mm +28.7mm |
Chainstay Length | 440mm | 432mm -8mm |
Chainstay Length Horizontal | 434.4mm | 427.4mm -7mm |
Front-Center | 634mm | 699mm +65mm |
Front-Center Horizontal | 630.6mm | 696.6mm +66mm |
Wheelbase | 1065mm | 1124mm +59mm |
Fork Offset/Rake | 51mm | 44mm -7mm |
Fork Length (Axle-To-Crown) | 395mm | — |
Fork Length, Unknown | — | 506mm |
Trail | 66.2mm high | 102.3mm +36.1mm very high |
Mechanical Trail | 62.6mm | 94.9mm +32.3mm |
Wheel Flop | 20.4mm | 35.5mm +15.1mm |
Standover Height | 778mm | 792mm +14mm |
Tire to Pedal Spindle | 115mm 170 mm cranks | 153.3mm +38.3mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 109mm 170 mm cranks | 132.7mm +23.7mm 175 mm cranks |
Build
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 38mm | 2.35in +0.85in |
Tire Outer Diameter | 698mm | 741.4mm +43.4mm |
Bike Length with Tires | 1763mm | 1865.4mm +102.4mm |
Crank Length | — | 175mm |
Handlebar Width | — | 750mm |
Stem Length | — | 70mm |
| Suspension Type | Rigid, non-suspension corrected | Hardtail (Front suspension) |
| Bar Type | Flat Bar | Flat Bar |
| Fork Travel | — | 100mm |
| Rear Travel | — | Unknown |
| Suspension Sag | — | Unknown |
| Frame Material | Aluminum | Aluminum |
| Fork Material | Carbon/Composite | Unknown |
| Brake Type | Disc | Disc |
Meta
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| Source | https://www.specializedconceptstore.co.uk/product/18823/2021-sirrus-x-4-0/ | https://www.specialized.com/au/en/chisel-comp/p/199641?color=319940-199641 |
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