2021 Specialized Bicycles Stumpjumper Base S4

Build

700C/29 in × 2.3 in

Insights

Average stack and reach vs trend of full-suspension trail mtb bikes
Design deviates from other sizes of Specialized Bicycles Stumpjumper
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
632mm
Reach
475mm
Stack to Reach Ratio
1.33:1
Seat Tube Length, Unknown
425mm
Top Tube Length, Effective/Horizontal Center
632mm
Top Tube Slope
20.8deg
Head Tube Angle
65deg
Seat Tube Angle
76deg
Head Tube Length
120mm
Bottom Bracket Drop
42mm
Bottom Bracket Height
327.4mm
Chainstay Length
432mm
Chainstay Length Horizontal
430mm
Front-Center
800mm
Front-Center Horizontal
798.1mm
Wheelbase
1228mm
Fork Offset/Rake
44mm
Fork Length, Unknown
550mm
Trail
123.7mm
very high
Mechanical Trail
112.1mm
Wheel Flop
47.4mm
Standover Height
749mm
Tire to Pedal Spindle Distance
With 170 mm cranks
260.6mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
157.4mm

Base Build

Wheel Size
700C, 29 inch (622mm BSD)
Tire Width
2.3in
Tire Outer Diameter
738.8mm
Bike Length with Tires
1966.8mm
Crank Length
170mm
Handlebar Width
780mm
Stem Length
50mm
Suspension Type
Full suspension
Bar Type
Flat Bar
Fork Travel
140mm
Rear Travel
130mm
Suspension Sag
Unknown
Frame Material
Carbon/Composite
Fork Material
Unknown
Brake Type
Disc
Source:https://www.specialized.com/us/en/s-works-stumpjumper/p/175248?color=281582-175248&searchText=93321-0001