The Formula Titanium Disc Brake Rotor Bolt Set is a terrific way to shed half the weight of the ordinary steel bolts. Okay, so we're talking 12 grams for the steel set, and now just six grams for the titanium version. But for some every gram counts, and we just knocked off twelve (pair of wheels). Not recommended for downhill use. One set contains 6 bolts -- enough for one wheel.