the whole cracked rims things is a complete utter farce.
i have gone through 4 sets of alloys now and must be 14-16 wheels.
Alloys per 4 generally costing over £600 and tires, always the rears, at over £340.
Recently BMW stealers wanted £410 a tire for 255/30/19 Bridgestone.
I am about to post a seperate header on my experiences of ownership over almost 4 years and the very expensive leasons i have learnt.
all i can say here is ditch Bridgestone RFT ASAP as soon as you have a problem as its only going to happen again and then again.