Great replacement for stock rear idler wheels on Arctic Cat Alpha single rail models Can also be used on other models, axle relocate may be required Unique fan style design creates a "vortex" to help with snow movement within the suspension High strength UHMWPE material Weighs less than 1 pound Accepts 6205 or 6304 bearings NOTE: Arctic Cat OEM Alpha rear idler wheel bearing will not work with this wheel .