2026 Specialized Stumpjumper 15 vs 2026 GT Sensor Carbon Pro
The M is the GT Sensor Carbon Pro size closest to your S3 Specialized Stumpjumper 15. 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 GT Sensor Carbon Pro
Compared with the Specialized Stumpjumper 15 in S3, the GT Sensor Carbon Pro in M places the top of the head tube 3 mm higher and 10 mm further forward, relative to the bottom bracket. Its wheelbase is 4 mm longer, which can contribute to stability at speed.
- Frame stack
- +3 mm
- Higher front end
- Frame reach
- +10 mm
- Longer frame reach
- Wheelbase
- +4 mm
- Longer: steadier at speed
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
Specialized Stumpjumper 15, S3GT Sensor Carbon Pro, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper 15 S3 | GT Sensor Carbon Pro M | Difference |
|---|---|---|---|
| Reach | 445 | 455 | +10 mm |
| Stack | 630 | 633 | +3 mm |
| Head tube angle | 64 | 65.0 | +1.0° |
| Seat tube angle | 76.5 | 77.0 | +0.5° |
| Effective top tube | 596 | 601 | +5 mm |
| Chainstay length | 435 | 440 | +5 mm |
| Wheelbase | 1217 | 1221 | +4 mm |
| BB drop | 35 | 36 | +1 mm |
| BB height | 340 | not listed | |
| Standover | 745 | not listed | |
| Seat tube length | 405 | 400 | −5 mm |
| Fork length | not listed | not listed | |
| Head tube length | 110 | 120 | +10 mm |
Differences are the GT Sensor Carbon Pro minus the Specialized Stumpjumper 15. Full charts: 2026 Specialized Stumpjumper 15, 2026 GT Sensor Carbon Pro.
Where each sits in its class
Specialized Stumpjumper 15GT Sensor Carbon Pro
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 15S-Works | GT Sensor Carbon ProCarbon Pro |
|---|---|---|
| Frame | Specialized FACT 11m | GT Sensor |
| Fork | Fox 36 Float Factory | RockShox Lyrik Select |
| Rear shock | Fox Float X Factory | RockShox Super Deluxe Select |
| Shifter | Shimano XTR M9250 | SRAM NX Eagle |
| Derailleur | Shimano XTR Di2 | SRAM GX AXS |
| Cassette | Shimano XTR | SRAM PG |
| Chain | Shimano XTR | not listed |
| Crankset | Shimano XTR | TruVativ Descendant GX |
| Chainring | Shimano XTR | not listed |
| Bottom bracket | Shimano BB93 | SRAM DUB BSA |
| Wheelset | Roval Traverse SL II | WTB KOM Trail |
| Tire | Specialized Butcher, Specialized Eliminator | Continental Kryptotal |
| Hub | Industry Nine Hydra 2 | not listed |
| Brake | Shimano XTR | SRAM Code R |
| Rotor | Shimano XTR | SRAM Code R |
| Handlebar | Race Face Era Carbon | GT Alloy Riser |
| Stem | Race Face Turbine R | not listed |
| Grips | Deity Lockjaw | not listed |
| Dropper post | Fox Transfer NEO Factory | not listed |
| Saddle | Specialized S-Works Power | not listed |
| Headset | not listed | FSA 42 |
| Seatpost | not listed | TranzX adjustable |
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