2021 Trek Fuel EX AL Gen 5 Frameset vs 2020 Specialized Stumpjumper 27.5
The XS is the Specialized Stumpjumper 27.5 size closest to your XS Trek Fuel EX AL Gen 5 Frameset. 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 AL Gen 5 Frameset in XS, the Specialized Stumpjumper 27.5 in XS places the top of the head tube 22 mm higher and 5 mm further forward, relative to the bottom bracket. Its wheelbase is 8 mm longer, which can contribute to stability at speed.
- Frame stack
- +22 mm
- Higher front end
- Frame reach
- +5 mm
- Longer frame reach
- Wheelbase
- +8 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- −4 mm
- Shorter: livelier
The two frames
Trek Fuel EX AL Gen 5 Frameset, XSSpecialized Stumpjumper 27.5, XSDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Fuel EX AL Gen 5 Frameset XS | Specialized Stumpjumper 27.5 XS | Difference |
|---|---|---|---|
| Reach | 400 | 405mm | +5 mm |
| Stack | 559 | 581mm | +22 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 75.5° | 76.5° | +1.0° |
| Effective top tube | 545 | not listed | |
| Chainstay length | 436 | 432mm | −4 mm |
| Wheelbase | 1119 | 1127mm | +8 mm |
| BB drop | 14 | 28mm | +14 mm |
| BB height | 341 | 325mm | −16 mm |
| Standover | 700 | 742mm | +42 mm |
| Seat tube length | 355 | 380mm | +25 mm |
| Head tube length | 90 | 100mm | +10 mm |
| Fork length | not listed | 522mm |
Differences are the Specialized Stumpjumper 27.5 minus the Trek Fuel EX AL Gen 5 Frameset. Full charts: 2021 Trek Fuel EX AL Gen 5 Frameset, 2020 Specialized Stumpjumper 27.5.
Where each sits in its class
Trek Fuel EX AL Gen 5 FramesetSpecialized 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 AL Gen 5 FramesetAL Gen 5 Frameset | Specialized Stumpjumper 27.5S-Works 27.5 |
|---|---|---|
| Frame | Trek Alpha Platinum | not listed |
| Stem | Bontrager Line | Specialized Deity |
| Headset | Trek Knock Block | not listed |
| Fork | not listed | Fox FLOAT Rhythm |
| Rear shock | not listed | Fox FLOAT DPX2 Factory |
| Shifter | not listed | Shimano XTR M9100 |
| Derailleur | not listed | Shimano XTR M9100 |
| Cassette | not listed | Shimano XTR M9100 |
| Chain | not listed | Shimano XTR M9100 |
| Crankset | not listed | Race Face Next |
| Wheelset | not listed | Roval Traverse SL |
| Tire | not listed | Specialized Butcher, Specialized Eliminator |
| Brake | not listed | Shimano XTR M9120 |
| Grips | not listed | Specialized Deity |
| Seatpost | not listed | Fox Transfer |
| Saddle | not listed | Specialized Myth 155 |
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