2020 Specialized Stumpjumper 29 vs 2020 Specialized Stumpjumper ST Alloy 29
The M is the Specialized Stumpjumper ST Alloy 29 size closest to your M Specialized Stumpjumper 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 29 in M, the Specialized Stumpjumper ST Alloy 29 in M 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, MSpecialized Stumpjumper ST Alloy 29, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper 29 M | Specialized Stumpjumper ST Alloy 29 M | Difference |
|---|---|---|---|
| Reach | 425mm | 425mm | ±0 mm |
| Stack | 614mm | 619mm | +5 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 74.5° | 74.5° | ±0.0° |
| Chainstay length | 437mm | 437mm | ±0 mm |
| Wheelbase | 1169mm | 1171mm | +2 mm |
| BB drop | 33mm | 33mm | ±0 mm |
| BB height | 342mm | 341mm | −1 mm |
| Standover | 750mm | 762mm | +12 mm |
| Seat tube length | 410mm | 410mm | ±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. Full charts: 2020 Specialized Stumpjumper 29, 2020 Specialized Stumpjumper ST Alloy 29.
Where each sits in its class
Specialized Stumpjumper 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 2929 | Specialized Stumpjumper ST Alloy 29 |
|---|---|---|
| Fork | RockShox RL Gold | not listed |
| Rear shock | RockShox Deluxe Select | not listed |
| Shifter | SRAM SX Eagle | not listed |
| Derailleur | SRAM SX Eagle | not listed |
| Cassette | SRAM SX Eagle | not listed |
| Chain | SRAM SX Eagle | not listed |
| Crankset | SRAM SX Eagle | not listed |
| Bottom bracket | SRAM PowerSpline | not listed |
| Pedals | Specialized PROVIDED BY | not listed |
| Tire | Specialized Butcher, Specialized Eliminator | not listed |
| Seatpost | X-Fusion Manic | not listed |
| Saddle | Specialized Myth 155 | not listed |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
