2021 Specialized Bicycles Sirrus X 4.0
- Category
- Fitness
- Design
- Flat Bar, Rigid, non-suspension corrected
- Frame
- Aluminum
- Fork
- Carbon/Composite
- Features
- Disc brake
Geometry
XXS | XS | S | M | L | XL | |
Stack | 587mm | 590mm | 606mm | 635mm | 651mm | 672mm |
Reach | 355mm | 371mm | 376mm | 382mm | 386mm | 398mm |
Stack to Reach Ratio | 1.65:1 | 1.59:1 | 1.61:1 | 1.66:1 | 1.69:1 | 1.69:1 |
Seat Tube Length, C-T | 360mm | 395mm | 440mm | 470mm | 510mm | 530mm |
Top Tube Length, Effective/Horizontal Center | 529mm | 549mm | 559mm | 573mm | 581mm | 599mm |
Top Tube Slope | 27.9deg | 23.6deg | 20.2deg | 19.7deg | 17deg | 16.6deg |
Head Tube Angle | 69.5deg | 70deg | 70deg | 71deg | 71deg | 71deg |
Seat Tube Angle | 73.5deg | 73.5deg | 73.5deg | 73.5deg | 73.5deg | 73.5deg |
Head Tube Length | 111mm | 125mm | 143mm | 169mm | 186mm | 208mm |
Bottom Bracket Drop | 70mm | 70mm | 70mm | 70mm | 70mm | 70mm |
Bottom Bracket Height | 279mm | 279mm | 279mm | 279mm | 279mm | 279mm |
Chainstay Length | 440mm | 440mm | 440mm | 440mm | 440mm | 440mm |
Chainstay Length Horizontal | 434.4mm | 434.4mm | 434.4mm | 434.4mm | 434.4mm | 434.4mm |
Front-Center | 602mm | 618mm | 629mm | 634mm | 644mm | 663mm |
Front-Center Horizontal | 598.6mm | 614.6mm | 625.6mm | 630.6mm | 639.6mm | 658.6mm |
Wheelbase | 1033mm | 1049mm | 1060mm | 1065mm | 1074mm | 1093mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm | 51mm | 51mm |
Fork Length (Axle-To-Crown) | 395mm | 395mm | 395mm | 395mm | 395mm | 395mm |
Trail | 76mm high | 72.8mm high | 72.8mm high | 66.2mm high | 66.2mm high | 66.2mm high |
Mechanical Trail | 71.2mm | 68.4mm | 68.4mm | 62.6mm | 62.6mm | 62.6mm |
Wheel Flop | 24.9mm | 23.4mm | 23.4mm | 20.4mm | 20.4mm | 20.4mm |
Standover Height | 700mm | 722mm | 750mm | 778mm | 810mm | 831mm |
Tire to Pedal Spindle | 83mm 170 mm cranks | 99mm 170 mm cranks | 110mm 170 mm cranks | 115mm 170 mm cranks | 125mm 170 mm cranks | 144mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 109mm 170 mm cranks | 109mm 170 mm cranks | 109mm 170 mm cranks | 109mm 170 mm cranks | 109mm 170 mm cranks | 109mm 170 mm cranks |
X 4.0 Build
XXS | XS | S | M | L | XL | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 38mm | 38mm | 38mm | 38mm | 38mm | 38mm |
Tire Outer Diameter | 698mm | 698mm | 698mm | 698mm | 698mm | 698mm |
Bike Length with Tires | 1731mm | 1747mm | 1758mm | 1763mm | 1772mm | 1791mm |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
FitnessSource:https://www.specializedconceptstore.co.uk/product/18823/2021-sirrus-x-4-0/