2021 Specialized Bicycles Sirrus X 4.0 XL

Build

700C/29 in × 38 mm

Insights

Very upright stack and reach vs trend of fitness bikes
Design deviates from other sizes of Specialized Bicycles Sirrus

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
672mm
Reach
398mm
Stack to Reach Ratio
1.69:1
Seat Tube Length, C-T
530mm
Top Tube Length, Effective/Horizontal Center
599mm
Top Tube Slope
16.6deg
Head Tube Angle
71deg
Seat Tube Angle
73.5deg
Head Tube Length
208mm
Bottom Bracket Drop
70mm
Bottom Bracket Height
279mm
Chainstay Length
440mm
Chainstay Length Horizontal
434.4mm
Front-Center
663mm
Front-Center Horizontal
658.6mm
Wheelbase
1093mm
Fork Offset/Rake
51mm
Fork Length (Axle-To-Crown)
395mm
Trail
66.2mm
high
Mechanical Trail
62.6mm
Wheel Flop
20.4mm
Standover Height
831mm
Tire to Pedal Spindle Distance
With 170 mm cranks
144mm
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
1791mm
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/