The Stumpjumper 15 EVO is designed to eliminate trade-offs in trail riding. It delivers the bump-absorbing capability of a larger bike while maintaining short-travel control, playfulness, and climbing efficiency. The bike offers extensive personalization options to tailor the ride to individual preferences.
The centerpiece of this bike is GENIE Shock Technology, a patent-pending air spring system that combines the control-enhancing linear spring rate of a coil spring through the bump zone with the progressive spring rate of an air spring at the end of the stroke. This hybrid approach provides the feel and control of a coil spring, better bottom-out prevention than a standard air spring, and a tunable platform for a playful ride.
GENIE delivers measurably superior performance compared to traditional air-sprung shocks. The Stumpjumper 15 achieves 16.3% better bump force management, allowing its 145mm rear wheel travel to absorb the same bump forces as a 170mm travel enduro bike. Field testing proves 57% better traction than standard air-sprung shocks because the supple, coil-like performance keeps the wheel in contact with the ground more consistently. Additionally, GENIE reduces bottom-outs by 39% compared to standard air springs through its pronounced rising rate in the final 30% of the stroke.
The geometry is carefully honed to deliver big bike capability when needed, nimble handling in tight sections, and efficient climbing. The generous cockpit centers the rider for optimized traction and corner control, while the low bottom bracket, slack head tube angle, and optimized fork offset maintain stability in rough terrain.
The Stumpjumper 15 features six distinct geometry settings for unmatched personalization. Head angle and bottom bracket height can be fine-tuned for stability or clearance. Wheel configuration is also adjustable—you can run big wheels front and rear or mix a 27.5" rear for a more responsive and playful ride using aftermarket shock links, with geometry remaining unaffected.
The frame features a lightweight FACT 11m carbon chassis and rear-end with SWAT 4.0 downtube storage integration. This flush-mounted system provides smooth operation and weather resistance. The bike is built for durability and backed by a lifetime, no-questions-asked replacement policy for suspension pivot bearings to the original owner.
All You Need To Know About Stumpjumper 15 EVO
GENIE Grants Every Trail Rider’s Wishes
This game-changing, patent-pending air spring technology that we invented grants every trail rider three wishes: feel and control of a coil spring, better bottom-out prevention than a standard air spring, and a tunable “platform” for a playful feel.
What’s Inside GENIE?
Check out how GENIE combines the control-enhancing linear spring rate of a coil spring through the “bump zone” with the progressive spring rate of an air spring at the end of the stroke to reduce bottom-outs. It's the best of both worlds – coil and air – with extra tuneability. Say goodbye to compromises and hello to the future of riding.
Unlock Your Ride with Tunable Geo
Stumpjumper 15 boasts the planet's most capable trail geometry. With six-way adjustability, tailor your ride to perfectly match your style and terrain. Explore our interactive Geo Finder to pinpoint your ideal setting.
Eats Bumps Like an Enduro
GENIE shock technology gives the Stumpy 15 16.3% better bump performance than ‘Bike of the Year’ Stumpjumper EVO. It literally uses more travel for the same size bump, thanks to its flatter spring curve in the first 70% of travel.
57% Better Traction
GENIE delivers 57% less traction loss time than a standard air-sprung shock because GENIE technology gives you supple, coil-like performance, which keeps the wheel in contact with the ground a greater percent of the time than a typical air spring would.
Bye, Bye, Bottom Outs
Send it with confidence knowing that in field testing GENIE eliminated 39% of severe bottom out events compared to a standard FOX Float air spring.
