2019 Specialized Stumpjumper ST Men's 27.5 vs 2021 Trek Fuel EX 9.9 Gen 5
The M is the Trek Fuel EX 9.9 Gen 5 size closest to your M Specialized Stumpjumper ST Men's 27.5. 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 Trek Fuel EX 9.9 Gen 5
Compared with the Specialized Stumpjumper ST Men's 27.5 in M, the Trek Fuel EX 9.9 Gen 5 in M places the top of the head tube 15 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 8 mm longer, which can contribute to stability at speed.
- Frame stack
- +15 mm
- Higher front end
- Frame reach
- +1 mm
- About the same reach
- Wheelbase
- +8 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- +3 mm
- Longer: more planted
The two frames
Specialized Stumpjumper ST Men's 27.5, MTrek Fuel EX 9.9 Gen 5, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper ST Men's 27.5 M | Trek Fuel EX 9.9 Gen 5 M | Difference |
|---|---|---|---|
| Reach | 444mm | 445 | +1 mm |
| Stack | 590mm | 605 | +15 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 76° | 75.5° | −0.5° |
| Effective top tube | 591mm | 602 | +11 mm |
| Chainstay length | 432mm | 435 | +3 mm |
| Wheelbase | 1170mm | 1178 | +8 mm |
| BB drop | 28mm | 28 | ±0 mm |
| BB height | 325mm | 346 | +21 mm |
| Standover | 749mm | 747 | −2 mm |
| Seat tube length | 410mm | 420 | +10 mm |
| Fork length | 522mm | not listed | |
| Head tube length | 110mm | 100 | −10 mm |
Differences are the Trek Fuel EX 9.9 Gen 5 minus the Specialized Stumpjumper ST Men's 27.5. Full charts: 2019 Specialized Stumpjumper ST Men's 27.5, 2021 Trek Fuel EX 9.9 Gen 5.
Where each sits in its class
Specialized Stumpjumper ST Men's 27.5Trek Fuel EX 9.9 Gen 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 ST Men's 27.5Men's 27.5 | Trek Fuel EX 9.9 Gen 59.9 X01 AXS Gen 5 |
|---|---|---|
| Fork | RockShox Recon RL | Fox 36 Factory |
| Rear shock | X-Fusion Pro RL | not listed |
| Shifter | Shimano SLX | SRAM Eagle AXS |
| Derailleur | Shimano SLX | SRAM X01 Eagle AXS |
| Chain | KMC X-11 | SRAM XX1 Eagle |
| Crankset | SRAM NX | SRAM X01 Eagle |
| Bottom bracket | SRAM PowerSpline | SRAM DUB |
| Tire | Specialized Butcher, Specialized Purgatory | Bontrager XR4 Team Issue |
| Brake | Tektro Gemini Comp | SRAM G2 Ultimate |
| Grips | Specialized Sip Grip | not listed |
| Saddle | Specialized Henge Comp | Bontrager Arvada |
| Frame | not listed | Trek OCLV |
| Cassette | not listed | SRAM X01 Eagle |
| Wheelset | not listed | Bontrager Line Pro 30 |
| Handlebar | not listed | Bontrager Line |
| Stem | not listed | Bontrager Line |
| Headset | not listed | Trek Knock Block |
| Seatpost | not listed | RockShox Reverb AXS |
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