Be aware the OEM discs only have 2mm of surface before they are 'worn out' so any skimming will significantly shorten their life.
get them measured before soing this to see how much if any they are warped.
Thanks for the feedback. My issues started a few thousand miles later.. When are you off to Italy?
Thanks.. does the measuring take into account build up of pad material?
I agree worn pads should not brake any worse than new ones, in fact news ones don't brake well until they have bedded in so the shape of the friction material matches the steel they are up against. I think where you might see differences, is brake dust building up (this acts as a lubricant) and also rusty or pitted areas on the discs (or hubs with handbrake) and and also if you remove and re-fit used shoes they never sit quite where they were and the contact area is reduced for some time before they bed in again. So new discs and pads will give ultimately the best performance after the pads have bedded in.I'm struggling to see why worn pads will brake less effectively than unworn pads. Until you run out of friction material, you've got the same surface area between the disc and pad, and everything else is equal. You may lose some thermal mass, and there may be some contamination but other than that.
Anyone?
C
If the tech lit for the discs is correct there is only 2mm of hardened surface...hopefully your skim will not need to be too deep.
Pic and vidSo they're done. Plenty of meat left on the discs. The run out was about 0.15mm.
He also stripped and cleaned the calipers. The end of one of the pads looked heat damaged. He also reckoned that they had been fitted dry so could have been binding or touching slightly. He applied brake grease not copaslip. It's obviously solved the issue so let's see how long it lasts....
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