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"They are so thick that even if a little metal is taken off ,I'm sure they will still meet the specific specs"
That is interesting, might I ask what you are basing this observation on? I do not have my Volvo spec book in front of me as I write this, but as I recall a new rotor is in the area of 22mm and discard is 20mm. That gives you a grand total of 2mm worth of wearable/machinable surface, that comes out to about .03937 per side. A really light cut on the rotors is in the area of .004-.006" per side so you are looking at a minimum of .008-.012" off of the rotors. Reality is that you have probably worn far more than that off of the rotors in normal wear and tear and now you want to machine them and make them flat and bitchen. Another fact, those rotors that are often times machined because they are a little warped will be thinner when they are done and less capable of handling the temperatures generated. This means that they are going to warp even faster now. I've seen it far too many times to not believe it is so.
As far as a set of $23.00 rotors goes, you get what you pay for and sometimes you don't even get that. I've tried most combinations of pads and rotors and I'd like to believe that there is a cheaper, better, or at least as good as option out there to factory brake parts but it just ain't so. I run either ATE rotors or factory rotors and always factory pads. Spend a little more money and buy the ATE rotors and get a set of factory pads and you will be happier.
Mark
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