2020 Specialized Stumpjumper Expert Carbon 29 vs 2020 Specialized Stumpjumper ST Alloy 29
The Specialized Stumpjumper ST Alloy 29 size closest to your M is the M. Compare the M instead
What changes on the Specialized Stumpjumper ST Alloy 29
Compared with the Specialized Stumpjumper Expert Carbon 29 in M, the Specialized Stumpjumper ST Alloy 29 in L places the top of the head tube 28 mm higher and 20 mm further forward, relative to the bottom bracket. Its wheelbase is 32 mm longer, which can contribute to stability at speed.
- Frame stack
- +28 mm
- Higher front end
- Frame reach
- +20 mm
- Longer frame reach
- Wheelbase
- +32 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Stumpjumper Expert Carbon 29, MSpecialized Stumpjumper ST Alloy 29, LDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper Expert Carbon 29 M | Specialized Stumpjumper ST Alloy 29 L | Difference |
|---|---|---|---|
| Reach | 425mm | 445mm | +20 mm |
| Stack | 614mm | 642mm | +28 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 74.5° | 74.1° | −0.4° |
| Chainstay length | 437mm | 437mm | ±0 mm |
| Wheelbase | 1169mm | 1201mm | +32 mm |
| BB drop | 33mm | 33mm | ±0 mm |
| BB height | 342mm | 341mm | −1 mm |
| Standover | 750mm | 775mm | +25 mm |
| Seat tube length | 410mm | 455mm | +45 mm |
| Fork length | 560mm | 560mm | ±0 mm |
| Head tube length | 95mm | 125mm | +30 mm |
Differences are the Specialized Stumpjumper ST Alloy 29 minus the Specialized Stumpjumper Expert Carbon 29. Full charts: 2020 Specialized Stumpjumper Expert Carbon 29, 2020 Specialized Stumpjumper ST Alloy 29.
Where each sits in its class
Specialized Stumpjumper Expert Carbon 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 Expert Carbon 29Expert Carbon 29 | Specialized Stumpjumper ST Alloy 29 |
|---|---|---|
| Rear shock | Fox Float DPX2 Performance | 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 | SRAM Descendant | not listed |
| Bottom bracket | SRAM DUB | not listed |
| Pedals | Specialized PROVIDED BY | not listed |
| Wheelset | Roval Traverse | not listed |
| Tire | Specialized Butcher, Specialized Eliminator | not listed |
| Hub | DT Swiss 370 | not listed |
| Brake | SRAM Code | not listed |
| Grips | Specialized Deity | not listed |
| Seatpost | X-Fusion Manic | not listed |
| Saddle | Specialized Bridge 155 S2 | 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
