2022 Trek Fuel EX AL Gen 5 Frameset vs 2020 Specialized Stumpjumper ST Alloy 27.5
The XL is the Specialized Stumpjumper ST Alloy 27.5 size closest to your XXL 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 ST Alloy 27.5
Compared with the Trek Fuel EX AL Gen 5 Frameset in XXL, the Specialized Stumpjumper ST Alloy 27.5 in XL places the top of the head tube 4 mm lower and 40 mm further back, relative to the bottom bracket. Its wheelbase is 26 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −4 mm
- Lower front end
- Frame reach
- −40 mm
- Shorter frame reach
- Wheelbase
- −26 mm
- Shorter: quicker to change direction
- Head angle
- −1.0°
- Slacker: calmer steering
- Chainstays
- −4 mm
- Shorter: livelier
The two frames
Trek Fuel EX AL Gen 5 Frameset, XXLSpecialized Stumpjumper ST Alloy 27.5, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Fuel EX AL Gen 5 Frameset XXL | Specialized Stumpjumper ST Alloy 27.5 XL | Difference |
|---|---|---|---|
| Reach | 520 | 480mm | −40 mm |
| Stack | 641 | 637mm | −4 mm |
| Head tube angle | 66.5° | 65.5° | −1.0° |
| Seat tube angle | 75.5° | 74.2° | −1.3° |
| Effective top tube | 687 | not listed | |
| Chainstay length | 436 | 432mm | −4 mm |
| Wheelbase | 1269 | 1243mm | −26 mm |
| BB drop | 27 | 21mm | −6 mm |
| BB height | 346 | 336mm | −10 mm |
| Standover | 806 | 770mm | −36 mm |
| Seat tube length | 540 | 505mm | −35 mm |
| Head tube length | 140 | 155mm | +15 mm |
| Fork length | not listed | 542mm |
Differences are the Specialized Stumpjumper ST Alloy 27.5 minus the Trek Fuel EX AL Gen 5 Frameset. Full charts: 2022 Trek Fuel EX AL Gen 5 Frameset, 2020 Specialized Stumpjumper ST Alloy 27.5.
Where each sits in its class
Trek Fuel EX AL Gen 5 FramesetSpecialized 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 AL Gen 5 FramesetAL Gen 5 Frameset | Specialized Stumpjumper ST Alloy 27.5 |
|---|---|---|
| Frame | Trek Alpha Platinum | not listed |
| Stem | Bontrager Line | not listed |
| Headset | Trek Knock Block | not listed |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
