2022 Trek Fuel EX 9.8 Gen 5 vs 2020 Specialized Stumpjumper ST Alloy 27.5
The XS is the Specialized Stumpjumper ST Alloy 27.5 size closest to your S Trek Fuel EX 9.8 Gen 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 Specialized Stumpjumper ST Alloy 27.5
Compared with the Trek Fuel EX 9.8 Gen 5 in S, the Specialized Stumpjumper ST Alloy 27.5 in XS places the top of the head tube 13 mm higher and 15 mm further back, relative to the bottom bracket. Its wheelbase is 16 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- +13 mm
- Higher front end
- Frame reach
- −15 mm
- Shorter frame reach
- Wheelbase
- −16 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- −4 mm
- Shorter: livelier
The two frames
Trek Fuel EX 9.8 Gen 5, SSpecialized Stumpjumper ST Alloy 27.5, XSDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Fuel EX 9.8 Gen 5 S | Specialized Stumpjumper ST Alloy 27.5 XS | Difference |
|---|---|---|---|
| Reach | 420 | 405mm | −15 mm |
| Stack | 568 | 581mm | +13 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 75.5° | 76.5° | +1.0° |
| Effective top tube | 567 | not listed | |
| Chainstay length | 436 | 432mm | −4 mm |
| Wheelbase | 1143 | 1127mm | −16 mm |
| BB drop | 14 | 28mm | +14 mm |
| BB height | 341 | 325mm | −16 mm |
| Standover | 708 | 742mm | +34 mm |
| Seat tube length | 395 | 380mm | −15 mm |
| Head tube length | 100 | 100mm | ±0 mm |
| Fork length | not listed | 522mm |
Differences are the Specialized Stumpjumper ST Alloy 27.5 minus the Trek Fuel EX 9.8 Gen 5. Full charts: 2022 Trek Fuel EX 9.8 Gen 5, 2020 Specialized Stumpjumper ST Alloy 27.5.
Where each sits in its class
Trek Fuel EX 9.8 Gen 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 | Trek Fuel EX 9.8 Gen 59.8 GX AXS Gen 5 | Specialized Stumpjumper ST Alloy 27.5 |
|---|---|---|
| Frame | Trek OCLV | not listed |
| Fork | Fox 36 Performance | not listed |
| Shifter | SRAM GX Eagle AXS | not listed |
| Derailleur | SRAM GX Eagle AXS | not listed |
| Cassette | SRAM GX Eagle | not listed |
| Chain | SRAM GX Eagle | not listed |
| Crankset | SRAM GX Eagle | not listed |
| Bottom bracket | SRAM DUB | not listed |
| Wheelset | Bontrager Line Elite 30 | not listed |
| Tire | Bontrager XR4 Team Issue | not listed |
| Brake | SRAM G2 RS 4-piston | not listed |
| Handlebar | Bontrager Line | not listed |
| Stem | Bontrager Line | not listed |
| Headset | Trek Knock Block | not listed |
| Seatpost | Bontrager Line Elite Dropper | not listed |
| Saddle | Bontrager Arvada | not listed |
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