2021 Specialized Bicycles Sirrus X 4.0 S

Build

700C/29 in × 38 mm

Insights

Very upright stack and reach vs trend of fitness bikes

Stack and Reach vs. Category Trend
View all sizes

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/