I'll second that. All the one's I've taken off were also 8mm. The Cizzy's themselves are 10mm, and the rotors are glued on from the factory. If you are replacing them, usually they have to be broken off. Tony On Tue, Sep 30, 2008 at 11:02 PM, Ed Kellock <ekellock at gmail.com> wrote: > All the dist caps I've removed have 8mm bolt heads. > > Ed