Quote:
Originally Posted by CanAutM3
I don't see it that difficult to understand. A different construction of the tire carcass and a different mold for the rubber thread can yield a different contact patch size for the same tire standard dimensions (Width/Ratio-Dia). BMW has been vocal to the fact that specific PSS were developped for the F8X.
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You should know by now, nothing comes easy to me
I do not think, but do not know for sure, a tire company will change the carcass construction for any specific car, that is too expensive to do. When a car company says the tires were specifically developed for their model, I believe what they really mean is the car company has some not-so-specific targets in terms of tires' hysteresis and modulus, and the tire company probably only changes the vulcanization time and/or temp, or possibly modify accelerants or softener levels on one or few layers to come up with something close to that target. Then again, you may be right, who knows.