This axle allows you to increase your wheel diameter without cutting your rails. Plus it puts two wheels next to the rails and keeps the weight inboard. You can go from a 7" wheel to an 8" wheel or 8" wheel to 9". These are available for Skidoo XM's G4's, and Gen5's. Our offset axles are designed to use 6205 bearings which are wide and larger in diameter than stock bearings. The ability to use a larger wheel bearing greatly increases strength and durability for demanding riders.