So you got incredible mileage out of your first 2 sets of rear tyres and very poor milage out of the 3rd. Why blame BMW, its hardly their fault is it. I guess you are aware that OE tyres on BMW's are marked as unique to BMW, dont know what the difference is but could it be that the first 2 sets were OE spec and the 3rd just run of the mill Bridgestones. You have not said if the tyres are all the same model, different models from the same manufacturer perform differently, the rubber could have been much softer as could the construction. Have they all been run flats.

Edited by thunderbird on 23/02/2012 at 17:47

Have you checked for the obvious things like tracking?

With the runflats, I have also found it is critical to keep a close eye on tyre pressures. Runflat = you don't get any visual clues if pressure has suffered a bad drop. For example, if you have alloys that have become slightly porous with age, you can easily drop a few PSI over a couple of weeks - enough to impact on tyre wear.