2019 Specialized Stumpjumper 27.5 vs 2020 Specialized Stumpjumper ST Alloy 27.5
The Specialized Stumpjumper ST Alloy 27.5 size closest to your M is the M. Compare the M instead
What changes on the Specialized Stumpjumper ST Alloy 27.5
Compared with the Specialized Stumpjumper 27.5 in M, the Specialized Stumpjumper ST Alloy 27.5 in L places the top of the head tube 27 mm higher and 20 mm further forward, relative to the bottom bracket. Its wheelbase is 33 mm longer, which can contribute to stability at speed.
- Frame stack
- +27 mm
- Higher front end
- Frame reach
- +20 mm
- Longer frame reach
- Wheelbase
- +33 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 27.5, MSpecialized Stumpjumper ST Alloy 27.5, LDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper 27.5 M | Specialized Stumpjumper ST Alloy 27.5 L | Difference |
|---|---|---|---|
| Reach | 435mm | 455mm | +20 mm |
| Stack | 596mm | 623mm | +27 mm |
| Head tube angle | 65.5° | 65.5° | ±0.0° |
| Seat tube angle | 75° | 74.6° | −0.4° |
| Effective top tube | 595mm | not listed | |
| Chainstay length | 432mm | 432mm | ±0 mm |
| Wheelbase | 1179mm | 1212mm | +33 mm |
| BB drop | 21mm | 21mm | ±0 mm |
| BB height | 336mm | 336mm | ±0 mm |
| Standover | 743mm | 769mm | +26 mm |
| Seat tube length | 410mm | 455mm | +45 mm |
| Fork length | 542mm | 542mm | ±0 mm |
| Head tube length | 110mm | 140mm | +30 mm |
Differences are the Specialized Stumpjumper ST Alloy 27.5 minus the Specialized Stumpjumper 27.5. Full charts: 2019 Specialized Stumpjumper 27.5, 2020 Specialized Stumpjumper ST Alloy 27.5.
Where each sits in its class
Specialized Stumpjumper 27.5Specialized Stumpjumper ST Alloy 27.5
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 27.5S-Works 27.5 | Specialized Stumpjumper ST Alloy 27.5 |
|---|---|---|
| Fork | Fox Float 36 Factory | not listed |
| Rear shock | Fox Float DPX2 Factory | not listed |
| Shifter | SRAM XX1 Eagle | not listed |
| Derailleur | SRAM XX1 Eagle | not listed |
| Cassette | SRAM X01 Eagle | not listed |
| Chain | SRAM XX1 Eagle | not listed |
| Crankset | SRAM XX1 Eagle | not listed |
| Tire | Specialized Butcher, Specialized Purgatory | not listed |
| Hub | Roval Traverse SL | not listed |
| Rim | Roval Traverse SL 27.5 | not listed |
| Brake | SRAM Guide RSC | not listed |
| Stem | Syntace MegaForce 2 | not listed |
| Grips | Specialized Sip Grip | not listed |
| Seatpost | Specialized Command Post IRcc | not listed |
| Saddle | Specialized Phenom Expert | not listed |
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