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post #21 of (permalink) Old 6th March 2013
Renoir White
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Re: Sanding brake discs

If we are talking about the rusty lip on the disc, as I understand it, if the lip is too deep there is a concern that it could catch the edge of the brake pad and cause it to 'grab' (although I have never experienced this problem with my worn old discs). If the discs are perfectly flat across the whole surface there is nothing to interfere with the pads.
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