XTX Snowmobile Belt Specially-formulated high temperature Neoprene with the highest level of Aramid ( product) available that delivers track-churning performance for the most aggressive riders. This innovative breakthrough design features deeper cogs on top and rounded cogs on the bottom for ultimate flexibility and long belt life. Quicker throttle response at mid-speed acceleration Greater secondary acceleration at high RPMs Reduction in slippage during the highest levels of torque Increased horsepower capacity Better performance during deceleration ( more responsive engine braking) Tested and proven reliable at well over 12,000 RPMs Cooler running than the leading competitors This is classified as " NON-RETURNABLE " per our Return Policy Please be sure your model/year is listed below before purchasing. Extreme Torque Drive Belts Specifications Description: Extreme Torque Drive Belts Out. Circumference: 43.25 Top Width (in): 1.459 Buyer?s Guide Ski-Doo Model Year Expedition Sport 550F 2011 Grand Touring 550F Sport 2010-2011 GSX 550F Sport 2010 MX Z 550F TNT 2010-2011 MX Z Sport 550F 2011 Renegade 550F Sport 2010-2011 Skandic 550F Tundra 2010-2011 Skandic 550F Tundra LT 2010-2011 Skandic 550F Tundra Sport 2010-2011 Skandic Tundra 2010-2011 Skandic Tundra LT 600 2010 This fitment information is based upon the stock version of the unit referenced and any accessory added or other modification could invalidate the quick reference information provided.