2021 Specialized Bicycles Stumpjumper Alloy (Low BB)
- Category
- Full-suspension Trail MTB
- Design
- Flat Bar, Full suspension
- Frame
- Aluminum
- Fork
- Steel
- Suspension
- 140mm fork travel
- Features
- Disc brake
Somewhat upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
S1 | S2 | S3 | S4 | S5 | S6 | |
Stack | 618mm | 613mm | 623mm | 631mm | 639mm | 649mm |
Reach | 410mm | 430mm | 450mm | 475mm | 500mm | 530mm |
Stack to Reach Ratio | 1.51:1 | 1.43:1 | 1.38:1 | 1.33:1 | 1.28:1 | 1.22:1 |
Seat Tube Length, C-T | 385mm | 385mm | 405mm | 425mm | 445mm | 465mm |
Top Tube Length, Effective/Horizontal HT Top | 545mm | 563mm | 586mm | 615mm | 643mm | 676mm |
Head Tube Angle | 65deg | 65deg | 65deg | 65deg | 65deg | 65deg |
Effective Seat Tube Angle, Unknown | 77.7deg | 77.7deg | 77.5deg | 77.2deg | 77deg | 76.9deg |
Head Tube Length | 100mm | 100mm | 110mm | 120mm | 130mm | 140mm |
Bottom Bracket Drop | 47mm | 42mm | 42mm | 42mm | 42mm | 42mm |
Bottom Bracket Height | 322.4mm | 327.4mm | 327.4mm | 327.4mm | 327.4mm | 327.4mm |
Chainstay Length | 444mm | 444mm | 444mm | 444mm | 454mm | 454mm |
Chainstay Length Horizontal | 441.5mm | 442mm | 442mm | 442mm | 452.1mm | 452.1mm |
Front-Center | 726mm | 746mm | 770mm | 799mm | 828mm | 863mm |
Front-Center Horizontal | 726.5mm | 746mm | 770mm | 799mm | 828mm | 863mm |
Wheelbase | 1168mm | 1188mm | 1212mm | 1241mm | 1280mm | 1315mm |
Fork Offset/Rake | 44mm | 44mm | 44mm | 44mm | 44mm | 44mm |
Fork Length (On-Axis) | 550mm | 550mm | 550mm | 550mm | 550mm | 550mm |
Trail | 123.7mm very high | 123.7mm very high | 123.7mm very high | 123.7mm very high | 123.7mm very high | 123.7mm very high |
Mechanical Trail | 112.1mm | 112.1mm | 112.1mm | 112.1mm | 112.1mm | 112.1mm |
Wheel Flop | 47.4mm | 47.4mm | 47.4mm | 47.4mm | 47.4mm | 47.4mm |
Standover Height | 742mm | 742mm | 750mm | 753mm | 777mm | 784mm |
Tire to Pedal Spindle | 191.6mm 165 mm cranks | 206.6mm 170 mm cranks | 230.6mm 170 mm cranks | 259.6mm 170 mm cranks | 288.6mm 170 mm cranks | 318.6mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 157.4mm 165 mm cranks | 157.4mm 170 mm cranks | 157.4mm 170 mm cranks | 157.4mm 170 mm cranks | 157.4mm 170 mm cranks | 152.4mm 175 mm cranks |
Alloy (Low BB) Build
S1 | S2 | S3 | S4 | S5 | S6 | |
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 | 2.3in | 2.3in | 2.3in | 2.3in | 2.3in | 2.3in |
Tire Outer Diameter | 738.8mm | 738.8mm | 738.8mm | 738.8mm | 738.8mm | 738.8mm |
Bike Length with Tires | 1906.8mm | 1926.8mm | 1950.8mm | 1979.8mm | 2018.8mm | 2053.8mm |
Crank Length | 165mm | 170mm | 170mm | 170mm | 170mm | 175mm |
Handlebar Width | 780mm | 780mm | 780mm | 780mm | 780mm | 780mm |
Stem Length | 40mm | 40mm | 50mm | 50mm | 50mm | 50mm |
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
Full-suspension Trail MTBSource:https://www.specialized.com/au/en/stumpjumper-alloy/p/175253?color=300705-175253&searchText=93321-7101