The Stumpjumper 15 Alloy is here and ready to eliminate any compromises in the trail game. Does it absorb bumps on the trail like a big bike? Check. Does it have the control, playfulness, and efficiency of bikes with less suspension travel? Double check. And what about various adjustment options to perfectly tailor your bike to your preferences and riding style? Check, check, check. REFINED KINEMATICS: As the epitome of a trail bike, the Stumpjumper 15 Alloy combines efficiency with optimal impact force management. For the anti-squat of the Stumpjumper 15 Alloy, we have found a balance between the previous model and the Stumpjumper EVO, as both offered excellent riding characteristics. PROGRESSIVE TRAIL GEOMETRY: The geometry of this bike delivers big bike virtues at the push of a button, providing a light, nimble steering feel in tight sections and highly efficient climbing ability. The centrally located, spacious cockpit centers the rider for optimal traction and cornering control. The low bottom bracket, slack head tube angle, and optimized fork offset ensure easy balance, even in challenging terrain, thanks to great stability. A FRAME FULL OF POSSIBILITIES: Six individual adjustments enable riders to perfectly fine-tune the ergonomics and efficiency of their bike according to their preferences and terrain. The steering angle and bottom bracket height can be altered for the optimal center of gravity or necessary ground clearance. FORM FOLLOWS FUN: Naturally, we can create a frame that is maximally stiff, but that’s not always wise. To become one with the bike, the frame needs to display a degree of flex. We designed the M5 aluminum chassis—front and rear sections, as well as the connection between them—as a unit that provides just the stiffness necessary for trail riding. WHEEL SIZE: All models equipped with coil-spring shocks feature different wheel sizes.