Thanks guys, the thing i worry about is warping standard ones, mine are horrible at the minute the bike sort of bounces on the brakes and you can really feel it on the lever. Was fine when i got it so i think it's heat warping due to hard riding two up and loaded :tongue just seems to me that floating discs should be able to expand without distorting. I'm planning a track day this year so i'm guessing they'll need to cope with a lot of heat ...