2026 Trek Fuel MX 9.9 Gen 7 vs 2024 Specialized Stumpjumper EVO Alloy LTD
The S4 is the Specialized Stumpjumper EVO Alloy LTD size closest to your L Trek Fuel MX 9.9 Gen 7. 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 EVO Alloy LTD
Compared with the Trek Fuel MX 9.9 Gen 7 in L, the Specialized Stumpjumper EVO Alloy LTD in S4 places the top of the head tube 6 mm lower and 7 mm further back, relative to the bottom bracket. Its wheelbase is 15 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- −7 mm
- Shorter frame reach
- Wheelbase
- −15 mm
- Shorter: quicker to change direction
- Head angle
- +0.3°
- About the same head angle
- Chainstays
- +2 mm
- About the same
The two frames
Trek Fuel MX 9.9 Gen 7, LSpecialized Stumpjumper EVO Alloy LTD, S4Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Fuel MX 9.9 Gen 7 L | Specialized Stumpjumper EVO Alloy LTD S4 | Difference |
|---|---|---|---|
| Reach | 482 | 475mm | −7 mm |
| Stack | 641 | 635mm | −6 mm |
| Head tube angle | 64.2° | 64.5° | +0.3° |
| Seat tube angle | 77.0° | 76.9° | −0.1° |
| Effective top tube | 618 | not listed | |
| Chainstay length | 439 | 441mm | +2 mm |
| Wheelbase | 1264 | 1249mm | −15 mm |
| BB drop | 31 | 35mm | +4 mm |
| BB height | 343 | 340mm | −3 mm |
| Standover | 754 | 760mm | +6 mm |
| Seat tube length | 420 | 425mm | +5 mm |
| Head tube length | 125 | 115mm | −10 mm |
Differences are the Specialized Stumpjumper EVO Alloy LTD minus the Trek Fuel MX 9.9 Gen 7. Full charts: 2026 Trek Fuel MX 9.9 Gen 7, 2024 Specialized Stumpjumper EVO Alloy LTD.
Where each sits in its class
Trek Fuel MX 9.9 Gen 7Specialized Stumpjumper EVO Alloy LTD
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 MX 9.9 Gen 79.9 X0 AXS Gen 7 | Specialized Stumpjumper EVO Alloy LTDAlloy LTD |
|---|---|---|
| Fork | Fox 36 Factory | Fox 36 Factory |
| Wheelset | Bontrager Line Pro 30 | Specialized Alloy |
| Tire | Maxxis Assegai/Minion DHR II | Specialized Butcher, Specialized Eliminator |
| Handlebar | Race Face ERA | not listed |
| Rear shock | not listed | Fox Float X Factory |
| Shifter | not listed | SRAM GX Eagle |
| Derailleur | not listed | SRAM GX Eagle AXS |
| Cassette | not listed | SRAM X01 Eagle |
| Chain | not listed | SRAM GX Eagle |
| Crankset | not listed | SRAM GX Eagle |
| Bottom bracket | not listed | SRAM DUB |
| Hub | not listed | Roval DT Swiss 370 |
| Rim | not listed | Roval Traverse |
| Brake | not listed | SRAM Code RS |
| Stem | not listed | Trail |
| Grips | not listed | Deity Lockjaw |
| Headset | not listed | Angle Adjust |
| Dropper post | not listed | X-Fusion Manic |
| Seatpost | not listed | X-Fusion Manic |
| Saddle | not listed | Bridge |
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