I was just wondering about buying a new disc rotor i run a 180mm hope trial disc 06(with the black caliper), I have found loads of different disc rotors on chain reactions, just wanted some help. 1. Are most disc rotors the same thickness to fit in the caliper i.e. will an avid, formula, hayes etc, disc fit into the hope caliper? 2. I have seen the hope saw rotor and they do it in 183mm size will this fit into the 180mm caliper or will it be a fraction too big? 3. I also saw Rich's Leeson disc for sale i do like, would of that been able to fit?(somehow i dont think it would) Also found this i know its abit of a random product to sell but i think its a good idea lol chainreactionscycles Cheers Tom P.S. Thanks for your help in advance