The Stumpjumper 15 Expert is here and ready to eliminate any compromises in trail performance. Can it tackle obstacles on the trail like a big bike? Absolutely. Does it offer the control, playfulness, and efficiency of bikes with less suspension travel? Definitely. And what about various adjustment options to perfectly tailor the bike to your preferences and riding style? Yes, yes, yes. EVEN MORE CAPABLE: Our new GENIE shock technology combines a playful and responsive ride with the downhill capabilities of enduro bikes. EVEN MORE CONTROLLED: The Stumpjumper 15 has better traction characteristics than our "Bike of the Year," the Stumpjumper EVO. ENDLESSLY CUSTOMIZABLE: Six different geometry settings, mullet or full 29er, adjustable spring curve, and much more. GENIE LEAVES NO WISH UNFULFILLED: Our latest innovation is GENIE. This air shock technology fulfills the three biggest desires of our riders: an almost "bulletproof" air shock with the smooth ride feel of a steel spring – plus ultra-fine adjustability. THE BEST OF BOTH WORLDS: GENIE combines the linear spring rate of a steel spring in the first 70% of the travel with the progressive spring rate of an air spring in the last 30%. This maximizes control and prevents bottom-outs. GENIE offers the best of both worlds – steel and air springs – along with tuning possibilities. Say goodbye to compromises. The future of trail riding begins now. BETTER IMPACT MANAGEMENT: With 16.3% better impact management than conventional air shocks, GENIE in the Stumpjumper 15 makes the bike feel like it has much more travel. For example, the Stumpjumper 15, with 145 mm in the rear, and our enduro with 170 mm both utilize 101 mm of travel to absorb an impact force of 1080 N. MORE TRACTION: Extensive lab and trail tests have also shown that the Stumpjumper 15 with GENIE has 57% better traction properties compared to a conventional air shock. Our new GENIE technology delivers the smooth performance of a steel spring, resulting in increased rear wheel contact with the ground compared to a typical air shock. Your energy is transferred more effectively, allowing for greater control. LESS BOTTOM-OUTS: The harder the hits, the more the "hidden reserve" of GENIE unleashes its full potential: in the last 30% of the travel, the damping resistance increases progressively – reducing the frequency and intensity of potential bottom-outs.