2019 Specialized Stumpjumper ST Men's Expert 27.5 vs 2021 Trek Fuel EX 9.9 Gen 5
The Trek Fuel EX 9.9 Gen 5 size closest to your M is the M. Compare the M instead
What changes on the Trek Fuel EX 9.9 Gen 5
Compared with the Specialized Stumpjumper ST Men's Expert 27.5 in M, the Trek Fuel EX 9.9 Gen 5 in XS places the top of the head tube 31 mm lower and 44 mm further back, relative to the bottom bracket. Its wheelbase is 51 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −31 mm
- Lower front end
- Frame reach
- −44 mm
- Shorter frame reach
- Wheelbase
- −51 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, MTrek Fuel EX 9.9 Gen 5, XSDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper ST Men's Expert 27.5 M | Trek Fuel EX 9.9 Gen 5 XS | Difference |
|---|---|---|---|
| Reach | 444mm | 400 | −44 mm |
| Stack | 590mm | 559 | −31 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 76° | 75.5° | −0.5° |
| Effective top tube | 591mm | 545 | −46 mm |
| Chainstay length | 432mm | 435 | +3 mm |
| Wheelbase | 1170mm | 1119 | −51 mm |
| BB drop | 28mm | 14 | −14 mm |
| BB height | 325mm | 341 | +16 mm |
| Standover | 735mm | 700 | −35 mm |
| Seat tube length | 410mm | 355 | −55 mm |
| Fork length | 522mm | not listed | |
| Head tube length | 110mm | 90 | −20 mm |
Differences are the Trek Fuel EX 9.9 Gen 5 minus the Specialized Stumpjumper ST Men's Expert 27.5. Full charts: 2019 Specialized Stumpjumper ST Men's Expert 27.5, 2021 Trek Fuel EX 9.9 Gen 5.
Where each sits in its class
Specialized Stumpjumper ST Men's Expert 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 Men's Expert 27.5Men's Expert 27.5 | Trek Fuel EX 9.9 Gen 59.9 X01 AXS Gen 5 |
|---|---|---|
| Fork | RockShox Pike RC | Fox 36 Factory |
| Rear shock | RockShox Deluxe RT3 | not listed |
| Shifter | SRAM GX Eagle | SRAM Eagle AXS |
| Derailleur | SRAM GX Eagle | SRAM X01 Eagle AXS |
| Cassette | SRAM GX Eagle | SRAM X01 Eagle |
| Chain | SRAM GX Eagle | SRAM XX1 Eagle |
| Crankset | TruVativ Descendant | SRAM X01 Eagle |
| Tire | Specialized Butcher, Specialized Purgatory | Bontrager XR4 Team Issue |
| Rim | Roval Traverse | not listed |
| Brake | SRAM Guide R | SRAM G2 Ultimate |
| Grips | Specialized Sip Grip | not listed |
| Seatpost | Specialized Command Post IRcc | RockShox Reverb AXS |
| Saddle | Specialized Phenom Comp | 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 |
| Stem | not listed | Bontrager Line |
| Headset | not listed | Trek Knock Block |
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
