2020 Trek Fuel EX 9.8 vs 2020 Specialized Stumpjumper 27.5
The XS is the Specialized Stumpjumper 27.5 size closest to your S Trek Fuel EX 9.8. 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 27.5
Compared with the Trek Fuel EX 9.8 in S, the Specialized Stumpjumper 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, SSpecialized Stumpjumper 27.5, XSDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Fuel EX 9.8 S | Specialized Stumpjumper 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 27.5 minus the Trek Fuel EX 9.8. Full charts: 2020 Trek Fuel EX 9.8, 2020 Specialized Stumpjumper 27.5.
Where each sits in its class
Trek Fuel EX 9.8Specialized Stumpjumper 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 9.89.8 | Specialized Stumpjumper 27.5S-Works 27.5 |
|---|---|---|
| Frame | Trek Fuel EX | not listed |
| Fork | Fox 36 Performance | Fox FLOAT Rhythm |
| Rear shock | Fox Float | Fox FLOAT DPX2 Factory |
| Shifter | Shimano XT | Shimano XTR M9100 |
| Derailleur | Shimano XT | Shimano XTR M9100 |
| Cassette | Shimano XT | Shimano XTR M9100 |
| Chain | Shimano XT M8100 | Shimano XTR M9100 |
| Crankset | TruVativ Descendant | Race Face Next |
| Chainring | TruVativ Descendant | not listed |
| Bottom bracket | Shimano MT500 | not listed |
| Wheelset | Bontrager Line | Roval Traverse SL |
| Tire | Bontrager XR4 Team Issue, Michelin Wild AM | Specialized Butcher, Specialized Eliminator |
| Brake | Shimano XT M8020, Shimano SLX M7120 | Shimano XTR M9120 |
| Rotor | Shimano SM-RT66 | not listed |
| Handlebar | Bontrager Line | not listed |
| Stem | Bontrager Line | Specialized Deity |
| Grips | Bontrager XR Trail | Specialized Deity |
| Headset | Bontrager Knock Block Integrated | not listed |
| Dropper post | Bontrager Line | not listed |
| Saddle | Bontrager Arvada | Specialized Myth 155 |
| Seatpost | not listed | Fox Transfer |
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