The Stumpjumper 15 Alloy is here to shatter every compromise in trail riding. Devour bumps like a big bike? Check. Enjoy short-travel precision, playfulness, and efficiency? Double check. And how about a heap of customisation to make it perfect for you—the rider who deserves it all? Check, check, check.
BREAKTHROUGH CAPABILITY
At the heart of the Stumpjumper 15 Alloy is GENIE Shock Technology—a game-changing system that combines the poppy, playful feel of a coil spring with the bottomless performance of a downhill bike.
ULTIMATE CONTROL
With GENIE, the Stumpjumper 15 Alloy delivers measurably better traction than the Stumpjumper EVO, winner of Bike of the Year. You get enhanced grip and control, making it easier to tackle everything from techy climbs to fast descents.
UNMATCHED PERSONALISATION
Customise your ride like never before with six-way geometry adjustment—tune head angle, bottom bracket height, and more for your exact riding style and terrain. Whether you’re chasing speed on a flow trail or looking for stability on the rough stuff, the Stumpjumper 15 Alloy adapts to your needs. Choose between mixed wheels or 29" wheels, and even adjust your spring curve for more or less support where you need it most.
GENIE—THE MAGIC CARPET RIDE
The biggest innovation on the Stumpjumper 15 Alloy is GENIE—a patent-pending air spring system that gives every trail rider their three wishes: the traction and feel of a coil spring, better bottom-out prevention than a standard air spring, and the ability to independently tune both mid-stroke and end-stroke support.
ILLUMINATING GENIE
GENIE blends the control-enhancing linear spring rate of a coil shock through the “bump zone” with the progressive spring rate of an air spring at the end of the stroke, preventing bottom-outs. This gives you the best of both worlds—coil-like plushness with the progressive tuning of air—for a ride that is fully customisable and incredibly forgiving.
WHAT BUMP?
With 16.3% better bump force management than a traditional air spring, GENIE allows the Stumpjumper 15 Alloy to feel like a bike with much more travel. For example, the 145mm rear travel on the Stumpjumper 15 Alloy absorbs the same bump force as a 170mm travel bike like the Enduro. That means more comfort and control without the extra weight.
TRACTION GALORE
Field testing has shown that GENIE provides 57% more traction than standard air shocks. By delivering supple, coil-like performance, GENIE keeps the wheel in contact with the ground longer, especially over technical terrain, giving you more grip and control where you need it most.
BYE-BYE, BOTTOM-OUTS
Thanks to GENIE’s two-stage rising rate, the Stumpjumper 15 Alloy experiences 39% fewer bottom-outs than bikes with traditional air springs. The progressive end-stroke absorbs big hits with ease, keeping your ride smooth and controlled, even on the most aggressive trails.
HONED GEOMETRY
This bike’s geometry delivers big-bike capability when you need it, while maintaining nimbleness in tight sections and efficiency on climbs. A low bottom bracket, slack head tube angle, and optimized fork offset keep you centred and stable over rough terrain. The generous cockpit optimises your position for maximum traction and cornering control, no matter what the trail throws your way.
RIDE YOUR WAY
The Stumpjumper 15 Alloy is the most personalisable trail bike ever, with six distinct geometry settings that allow you to adjust the ride for any trail or terrain. Whether you're looking for stability on steep descents or clearance over technical features, the Stumpjumper 15 Alloy can be fine-tuned to suit your riding style.
WHEEL CHOICE
Thanks to our aftermarket shock links, you can opt for big wheels front and rear or mix things up with a 27.5” rear for a more responsive, playful ride. Regardless of your setup, the bike’s geometry remains unchanged, meaning you’ll always enjoy a consistent, dialed-in ride.
CARRY IT ALL
SWAT integration on the Stumpjumper 15 Alloy brings an elevated downtube storage system that’s sleek, secure, and weather-resistant. Whether it’s tools, a spare tube, or snacks, the SWAT system ensures you have everything you need without compromising ride performance.
MORE RELENTLESS THAN YOU
The Stumpjumper 15 Alloy is built to handle years of hard riding, backed by our lifetime replacement of suspension pivot bearings for the original owner. With our industry-leading support and warranty policies, you can ride with confidence knowing we've got you covered.
