52 tooth to 81 tooth. #35 Chain Pitch, 2 Piece Design All Ultra-Lite series Rocket Sprockets come with the exclusive free rolling tooth designed to help reduce the chain from "catching" the sides of the sprocket while the chain is rolling into place thus reducing the drag between the chain and sprocket. Also standard is the patented Quick Change mounting method. Just loosen the retaining nuts a couple of turns and the sprocket will lift and rotate off of the hub, "no more loosening your nuts" and also the regular standard hole pattern is machined into each sprocket as well. Rocket Sprockets use only 7075-T6 aluminum at .160 thickness, Rear Axle Sprocket
