2020 Specialized Stumpjumper ST Alloy 29 vs 2020 Specialized Stumpjumper Comp Alloy 29
The Specialized Stumpjumper Comp Alloy 29 size closest to your M is the M. Compare the M instead
What changes on the Specialized Stumpjumper Comp Alloy 29
Compared with the Specialized Stumpjumper ST Alloy 29 in M, the Specialized Stumpjumper Comp Alloy 29 in S places the top of the head tube at about the same height and 20 mm further back, relative to the bottom bracket. Its wheelbase is 20 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- ±0 mm
- About the same height
- Frame reach
- −20 mm
- Shorter frame reach
- Wheelbase
- −20 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Stumpjumper ST Alloy 29, MSpecialized Stumpjumper Comp Alloy 29, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper ST Alloy 29 M | Specialized Stumpjumper Comp Alloy 29 S | Difference |
|---|---|---|---|
| Reach | 425mm | 405mm | −20 mm |
| Stack | 619mm | 619mm | ±0 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 74.5° | 74.8° | +0.3° |
| Chainstay length | 437mm | 437mm | ±0 mm |
| Wheelbase | 1171mm | 1151mm | −20 mm |
| BB drop | 33mm | 33mm | ±0 mm |
| BB height | 341mm | 341mm | ±0 mm |
| Standover | 762mm | 756mm | −6 mm |
| Seat tube length | 410mm | 380mm | −30 mm |
| Fork length | 560mm | 560mm | ±0 mm |
| Head tube length | 100mm | 100mm | ±0 mm |
Differences are the Specialized Stumpjumper Comp Alloy 29 minus the Specialized Stumpjumper ST Alloy 29. Full charts: 2020 Specialized Stumpjumper ST Alloy 29, 2020 Specialized Stumpjumper Comp Alloy 29.
Where each sits in its class
Specialized Stumpjumper ST Alloy 29Specialized Stumpjumper Comp Alloy 29
Each bike is ranked against the other trail bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Specialized Stumpjumper ST Alloy 29 | Specialized Stumpjumper Comp Alloy 29Comp Alloy 29 |
|---|---|---|
| Fork | not listed | Fox FLOAT Rhythm |
| Rear shock | not listed | Fox Float DPS Performance |
| Shifter | not listed | SRAM NX Eagle |
| Derailleur | not listed | SRAM NX Eagle |
| Cassette | not listed | SRAM NX Eagle |
| Chain | not listed | SRAM NX Eagle |
| Crankset | not listed | SRAM NX Eagle |
| Bottom bracket | not listed | SRAM DUB |
| Tire | not listed | Specialized Butcher, Specialized Eliminator |
| Rim | not listed | Roval Traverse 29 |
| Grips | not listed | Specialized Sip Grip |
| Seatpost | not listed | X-Fusion Manic |
| Saddle | not listed | Specialized Phenom |
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