[QUOTE=Mr Beeza;632601]Mmmmm...can't agree that it won't take much to put a disc out of true; stainless discs are very strong. What lightweight ones do you mean - I didn't know that such were available?
Can't agree that pulse you felt had something to do with out of true discs - it had to do with deposits on the disc. If you have any more pulsing and get rid of the discs, send them to me. Muchas gracias.[/Q
The warped discs I had were BMW R stainless and no they had'nt picked up they were parallel and smooth, admitted they were grooved but if thats concentric it should'nt affect anything, BUT they were warped, the callipers were working OK, now if a disc (especially a non floating disc) is rotating out of true either the calliper copes with the movement which is just about impossible and so the disc puts alternating pressure on the pads which feeds alternating pressure back up the fluid/piston/lever.
Looked at the stoptech web page and have to admit I havn't read every single letter, and although its interesting I kept thinking when is this guy going to say something relevant to bike discs! He's talking car stuff and when you have said its basically the same principal you have said enough. He must get two thirds the way down the artical before he even mentions steel discs then two or three lines later simply says so lets hear no more about steel discs. Most of us will have played about with the road going 12 mil. thick cast iron car discs braying the crap out of them to get corrosion off and yes finding they have picked up/out of parallel and pulsing like hell, but no sorry bikes --- its another ball game UOTE]