We have just had our BMW320CI convertible serviced by AH Autos at Guildford (who offer a fantastic service at realistic prices). They have identified a cracked front wheel 225/40/18 and two buckled wheels, one a 225/40/18 and one 255/35/18. Have you come across this before and if so how have you resolved the problem? They have also identified 3 damaged tyres. I am thinking about getting a whole set of wheels and tyres from an Internet based company "Your Wheels Gateway". What are your thoughts on this line of action and should I specify any particular make of tyre for the best ride, etc.