2019 Specialized Stumpjumper ST 27.5 vs 2021 Trek Fuel EX 9.9 Gen 5
The S is the Trek Fuel EX 9.9 Gen 5 size closest to your S Specialized Stumpjumper ST 27.5. 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 Trek Fuel EX 9.9 Gen 5
Compared with the Specialized Stumpjumper ST 27.5 in S, the Trek Fuel EX 9.9 Gen 5 in S places the top of the head tube 18 mm lower and 5 mm further back, relative to the bottom bracket. Its wheelbase is 6 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −18 mm
- Lower front end
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- −6 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- +4 mm
- Longer: more planted
The two frames
Specialized Stumpjumper ST 27.5, STrek Fuel EX 9.9 Gen 5, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper ST 27.5 S | Trek Fuel EX 9.9 Gen 5 S | Difference |
|---|---|---|---|
| Reach | 425mm | 420 | −5 mm |
| Stack | 586mm | 568 | −18 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 76.3° | 75.5° | −0.8° |
| Effective top tube | 568mm | 567 | −1 mm |
| Chainstay length | 432mm | 436 | +4 mm |
| Wheelbase | 1149mm | 1143 | −6 mm |
| BB drop | 28mm | 14 | −14 mm |
| BB height | 325mm | 341 | +16 mm |
| Standover | 731mm | 708 | −23 mm |
| Seat tube length | 380mm | 395 | +15 mm |
| Fork length | 522mm | not listed | |
| Head tube length | 105mm | 100 | −5 mm |
Differences are the Trek Fuel EX 9.9 Gen 5 minus the Specialized Stumpjumper ST 27.5. Full charts: 2019 Specialized Stumpjumper ST 27.5, 2021 Trek Fuel EX 9.9 Gen 5.
Where each sits in its class
Specialized Stumpjumper ST 27.5Trek Fuel EX 9.9 Gen 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 | Specialized Stumpjumper ST 27.5S-Works 27.5 | Trek Fuel EX 9.9 Gen 59.9 X01 AXS Gen 5 |
|---|---|---|
| Fork | Fox FLOAT 34 Factory | Fox 36 Factory |
| Rear shock | Fox Float DPS Factory | not listed |
| Shifter | SRAM XX1 Eagle | SRAM Eagle AXS |
| Derailleur | SRAM XX1 Eagle | SRAM X01 Eagle AXS |
| Cassette | SRAM X01 Eagle | SRAM X01 Eagle |
| Chain | SRAM XX1 Eagle | SRAM XX1 Eagle |
| Crankset | SRAM XX1 Eagle | SRAM X01 Eagle |
| Tire | Specialized Butcher, Specialized Purgatory | Bontrager XR4 Team Issue |
| Hub | Roval Traverse SL | not listed |
| Rim | Roval Traverse SL 27.5 | not listed |
| Brake | SRAM Guide RSC | SRAM G2 Ultimate |
| Stem | Syntace MegaForce 2 | Bontrager Line |
| Grips | Specialized Sip Grip | not listed |
| Seatpost | Specialized Command Post IRcc | RockShox Reverb AXS |
| Saddle | Specialized Phenom Expert | Bontrager Arvada |
| Frame | not listed | Trek OCLV |
| Bottom bracket | not listed | SRAM DUB |
| Wheelset | not listed | Bontrager Line Pro 30 |
| Handlebar | not listed | Bontrager Line |
| Headset | not listed | Trek Knock Block |
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