[masraum]

Originally Posted by Gus Berges

Just got back from the dealership where they gave me the figures for the % of wear (solely based on disc thickness) on each disc. They are as follows: FL: 23%, FR: 34%, RL: 15%, RR: 15%. Due to the difference between FL and FR (an extra 50%..) they decided to purchase a new measuring device as they could not believe the difference, but the new measuring device yielded the same results as their old unit. The initial maximum thickness was obtained by measuring the outside border of the disc as they claim there is a very slight "lip" on them. For each disc, they took the measurements at the wear indicators (3 per disc). Tech found it very odd that the rears have been used much less than the fronts as their experience (with iron rotors) is that the rears wear out much faster than the fronts. His concern also stems from the fact that there is more tire wear on the rears than the fronts and there is some issue with the PTV+ (implying it's been driven well). They have no explanation for the difference in wear between the two front discs. They did admit that it was a big learning lesson for them figuring all of this out and having to dig through tech manuals and documentation I provided them with.

Their measurements contradict what ReDisc states (solely based on picture sent of wear indicators). ReDisc claims that they are "at least" 50% worn and should be weighed to determine actual wear. Oddly enough, the pics I sent ReDisc are of the rear discs which show the least amount of wear as per the local dealer who claimed that he had to remove one of the rear discs as he could not find the wear indicator on the outside braking surface of the disc even with a loupe, but I could see it clearly, hence me having some doubts regarding the validity of their measurements....

Very interesting.

Where in the photo that you posted in the visual wear indicator?

Not a great sign that the dealership seemed (and still does) pretty clueless. Granted, I'm sure they don't run into these on a daily basis, but you'd think they'd have at least one guy on staff that was really knowledgeable. But then that would probably eat into their profits too much.