When I had my Rover 620SLi, I warped the standard front discs within a matter of months, which caused lots of juddering when braking. Within 6 months of getting the Ti and some shiny Tar-Ox discs, I had warped those too. At the moment I'm back on the original Rover discs, but I'm getting concerned about warping these too cos I'm not sure what it is I'm doing that's causing them to warp or whether it's just shitty discs.
IIRC, I saw a discussion about this topic on another NG and that it was braking from high speed that can cause warping.. although some thought keeping the brake depressed while stationery at traffic lights could warp the disc on account of having the calipers clamped onto hot & thus softer discs. Well, I may break a little heavily sometimes, but not emergency-stop treatment! And I rarely keep the foot brakes on at lights.
So, is it just me doing something dumb or does this happen to you guys and how long have your discs lasted?
Bigus