2018 Specialized Stumpjumper ST Men's Expert 27.5 vs 2020 Trek Fuel EX 9.8
The ML is the Trek Fuel EX 9.8 size closest to your L Specialized Stumpjumper ST Men's Expert 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 9.8
Compared with the Specialized Stumpjumper ST Men's Expert 27.5 in L, the Trek Fuel EX 9.8 in ML places the top of the head tube 9 mm lower and 5 mm further back, relative to the bottom bracket. Its wheelbase is 8 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −9 mm
- Lower front end
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- −8 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- +3 mm
- Longer: more planted
The two frames
Specialized Stumpjumper ST Men's Expert 27.5, LTrek Fuel EX 9.8, MLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper ST Men's Expert 27.5 L | Trek Fuel EX 9.8 ML | Difference |
|---|---|---|---|
| Reach | 465mm | 460 | −5 mm |
| Stack | 618mm | 609 | −9 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 75.6° | 75.5° | −0.1° |
| Effective top tube | 624mm | 618 | −6 mm |
| Chainstay length | 432mm | 435 | +3 mm |
| Wheelbase | 1203mm | 1195 | −8 mm |
| BB drop | 28mm | 28 | ±0 mm |
| BB height | 325mm | 346 | +21 mm |
| Standover | 750mm | 752 | +2 mm |
| Seat tube length | 455mm | 435 | −20 mm |
| Fork length | 522mm | not listed | |
| Head tube length | 140mm | 105 | −35 mm |
Differences are the Trek Fuel EX 9.8 minus the Specialized Stumpjumper ST Men's Expert 27.5. Full charts: 2018 Specialized Stumpjumper ST Men's Expert 27.5, 2020 Trek Fuel EX 9.8.
Where each sits in its class
Specialized Stumpjumper ST Men's Expert 27.5Trek Fuel EX 9.8
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 Men's Expert 27.5Men's Expert 27.5 | Trek Fuel EX 9.89.8 |
|---|---|---|
| Fork | RockShox Pike RC | Fox 36 Performance |
| Rear shock | RockShox Deluxe RT3 | Fox Float |
| Shifter | SRAM GX Eagle | Shimano XT |
| Derailleur | SRAM GX Eagle | Shimano XT |
| Cassette | SRAM GX Eagle | Shimano XT |
| Chain | SRAM GX Eagle | Shimano XT M8100 |
| Crankset | TruVativ Descendant | TruVativ Descendant |
| Tire | Specialized Butcher, Specialized Purgatory | Bontrager XR4 Team Issue, Michelin Wild AM |
| Rim | Roval Traverse | not listed |
| Brake | SRAM Guide R | Shimano XT M8020, Shimano SLX M7120 |
| Grips | Specialized Sip Grip | Bontrager XR Trail |
| Seatpost | Specialized Command Post IRcc | not listed |
| Saddle | Specialized Phenom Comp | Bontrager Arvada |
| Frame | not listed | Trek Fuel EX |
| Chainring | not listed | TruVativ Descendant |
| Bottom bracket | not listed | Shimano MT500 |
| Wheelset | not listed | Bontrager Line |
| Rotor | not listed | Shimano SM-RT66 |
| Handlebar | not listed | Bontrager Line |
| Stem | not listed | Bontrager Line |
| Headset | not listed | Bontrager Knock Block Integrated |
| Dropper post | not listed | Bontrager Line |
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