2019 Specialized Stumpjumper Men's Pro 29 vs 2020 Specialized Stumpjumper ST Alloy 29
The S is the Specialized Stumpjumper ST Alloy 29 size closest to your S Specialized Stumpjumper Men's Pro 29. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Specialized Stumpjumper ST Alloy 29
Compared with the Specialized Stumpjumper Men's Pro 29 in S, the Specialized Stumpjumper ST Alloy 29 in S places the top of the head tube 5 mm higher and about as far forward, relative to the bottom bracket.
- Frame stack
- +5 mm
- Higher front end
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- +2 mm
- About the same
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Stumpjumper Men's Pro 29, SSpecialized Stumpjumper ST Alloy 29, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper Men's Pro 29 S | Specialized Stumpjumper ST Alloy 29 S | Difference |
|---|---|---|---|
| Reach | 405mm | 405mm | ±0 mm |
| Stack | 614mm | 619mm | +5 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 74.8° | 74.8° | ±0.0° |
| Effective top tube | 572mm | not listed | |
| Chainstay length | 437mm | 437mm | ±0 mm |
| Wheelbase | 1149mm | 1151mm | +2 mm |
| BB drop | 33mm | 33mm | ±0 mm |
| BB height | 342mm | 341mm | −1 mm |
| Standover | 747mm | 756mm | +9 mm |
| Seat tube length | 380mm | 380mm | ±0 mm |
| Fork length | 560mm | 560mm | ±0 mm |
| Head tube length | 95mm | 100mm | +5 mm |
Differences are the Specialized Stumpjumper ST Alloy 29 minus the Specialized Stumpjumper Men's Pro 29. Full charts: 2019 Specialized Stumpjumper Men's Pro 29, 2020 Specialized Stumpjumper ST Alloy 29.
Where each sits in its class
Specialized Stumpjumper Men's Pro 29Specialized Stumpjumper ST 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 Men's Pro 29Men's Pro 29 | Specialized Stumpjumper ST Alloy 29 |
|---|---|---|
| Fork | Fox Float 36 Factory | not listed |
| Rear shock | Fox Float DPX2 Factory | not listed |
| Shifter | SRAM GX Eagle | not listed |
| Derailleur | SRAM GX Eagle | not listed |
| Cassette | SRAM GX Eagle | not listed |
| Chain | SRAM GX Eagle | not listed |
| Crankset | TruVativ Descendant | not listed |
| Tire | Specialized Butcher, Specialized Purgatory | not listed |
| Hub | DT Swiss 350 | not listed |
| Rim | Roval Traverse | not listed |
| Brake | SRAM Guide RS | not listed |
| Grips | Specialized Sip Grip | not listed |
| Seatpost | Specialized Command Post IRcc | not listed |
| Saddle | Specialized Phenom Comp | not listed |
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