BSD Superlite SprocketThe original BSD sprocket, the Superlite. Man, weve sold a lot of these sprockets over the years and for good reason.. The BSD Superlite sprocket is light and looks great. With a classic tri spoke look, the Superlite doesnt compromise on strength, with an 8mm thickness at the edge that tapers to 6mm at the center to save weight. Super tough 7075 T6 construction 8mm thick at the edges for strength Tapers to 6mm at the center to save weight Centre hole