2019 Specialized Stumpjumper 29 Frameset vs 2020 Specialized Stumpjumper ST Alloy 29
The S is the Specialized Stumpjumper ST Alloy 29 size closest to your S Specialized Stumpjumper 29 Frameset. 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 29 Frameset 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 29 Frameset, SSpecialized Stumpjumper ST Alloy 29, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper 29 Frameset 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 29 Frameset. Full charts: 2019 Specialized Stumpjumper 29 Frameset, 2020 Specialized Stumpjumper ST Alloy 29.
Where each sits in its class
Specialized Stumpjumper 29 FramesetSpecialized 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 29 FramesetS-Works 29 Frameset | Specialized Stumpjumper ST Alloy 29 |
|---|---|---|
| Rear shock | Fox Float DPX2 Factory | not listed |
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