2021 Trek Fuel EX 9.9 Gen 5 vs 2019 Specialized Stumpjumper ST Men's Comp Carbon 27.5
The S is the Specialized Stumpjumper ST Men's Comp Carbon 27.5 size closest to your S Trek Fuel EX 9.9 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 Men's Comp Carbon 27.5
Compared with the Trek Fuel EX 9.9 Gen 5 in S, the Specialized Stumpjumper ST Men's Comp Carbon 27.5 in S places the top of the head tube 18 mm higher and 5 mm further forward, relative to the bottom bracket. Its wheelbase is 6 mm longer, which can contribute to stability at speed.
- Frame stack
- +18 mm
- Higher front end
- Frame reach
- +5 mm
- Longer frame reach
- Wheelbase
- +6 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 9.9 Gen 5, SSpecialized Stumpjumper ST Men's Comp Carbon 27.5, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Fuel EX 9.9 Gen 5 S | Specialized Stumpjumper ST Men's Comp Carbon 27.5 S | Difference |
|---|---|---|---|
| Reach | 420 | 425mm | +5 mm |
| Stack | 568 | 586mm | +18 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 75.5° | 76.3° | +0.8° |
| Effective top tube | 567 | 568mm | +1 mm |
| Chainstay length | 436 | 432mm | −4 mm |
| Wheelbase | 1143 | 1149mm | +6 mm |
| BB drop | 14 | 28mm | +14 mm |
| BB height | 341 | 325mm | −16 mm |
| Standover | 708 | 731mm | +23 mm |
| Seat tube length | 395 | 380mm | −15 mm |
| Head tube length | 100 | 105mm | +5 mm |
| Fork length | not listed | 522mm |
Differences are the Specialized Stumpjumper ST Men's Comp Carbon 27.5 minus the Trek Fuel EX 9.9 Gen 5. Full charts: 2021 Trek Fuel EX 9.9 Gen 5, 2019 Specialized Stumpjumper ST Men's Comp Carbon 27.5.
Where each sits in its class
Trek Fuel EX 9.9 Gen 5Specialized Stumpjumper ST Men's Comp Carbon 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 9.9 Gen 59.9 X01 AXS Gen 5 | Specialized Stumpjumper ST Men's Comp Carbon 27.5Men's Comp Carbon 27.5 12-speed |
|---|---|---|
| Frame | Trek OCLV | not listed |
| Fork | Fox 36 Factory | Fox FLOAT 34 Rhythm |
| Shifter | SRAM Eagle AXS | SRAM NX Eagle |
| Derailleur | SRAM X01 Eagle AXS | SRAM NX Eagle |
| Cassette | SRAM X01 Eagle | SRAM NX Eagle |
| Chain | SRAM XX1 Eagle | SRAM NX Eagle |
| Crankset | SRAM X01 Eagle | SRAM NX Eagle |
| Bottom bracket | SRAM DUB | SRAM DUB |
| Wheelset | Bontrager Line Pro 30 | not listed |
| Tire | Bontrager XR4 Team Issue | Specialized Butcher, Specialized Purgatory |
| Brake | SRAM G2 Ultimate | SRAM Guide R |
| Handlebar | Bontrager Line | not listed |
| Stem | Bontrager Line | not listed |
| Headset | Trek Knock Block | not listed |
| Seatpost | RockShox Reverb AXS | X-Fusion Manic |
| Saddle | Bontrager Arvada | Specialized Phenom Comp |
| Rear shock | not listed | Fox Float DPS Performance |
| Rim | not listed | Roval Traverse 27.5 |
| Grips | not listed | Specialized Sip Grip |
| Dropper post | not listed | X-Fusion Manic |
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
