The Stumpjumper 15 Alloy is here and ready to eliminate any compromises in the trail game. Does it swallow chunks on the trail like a big bike? Check. Does it have the control, playfulness, and efficiency of bikes with little suspension travel? Double check. And what about various adjustment options so you can perfectly tailor your bike to you and your riding style? Check, check, check. PERFECTED KINEMATICS: As the epitome of a trail bike, the Stumpjumper 15 Alloy combines efficiency with optimal impact force management. With the anti-squat of the Stumpjumper 15 Alloy, we have created a balance between the predecessor model and the Stumpjumper EVO, as both brought excellent riding characteristics. PROGRESSIVE TRAIL GEOMETRY: The geometry of this bike delivers big bike virtues on demand, a feather-light agile steering feel in tight sections, and an incredibly efficient climbing behavior. The central, spacious cockpit centers the rider for optimal traction and cornering control. The low bottom bracket, slack head tube angle, and optimized fork offset provide easy balance even in difficult terrain thanks to plenty of stability. A FRAME FULL OF POSSIBILITIES: Six individual settings allow riders to perfectly adjust the ergonomics and efficiency of their bike according to preferences and terrain. The steering angle and bottom bracket height can be changed for optimal center of gravity or necessary ground clearance. FORM FOLLOWS FUN: Of course, we can build a frame that is maximally stiff, but that is not always sensible. To become one with the bike, the frame must exhibit a certain degree of compliance. We designed the M5 aluminum chassis – front and rear end as well as the connection in between – as a unit that provides exactly the stiffness required for trail riding. WHEEL SIZE: All models with steel spring shock absorbers are equipped with differently sized wheels.