Hello, I am having trouble with my tires on my 2002 330ci convertable. I have the V Spoke 18" wheels (one of the options you can add on with the packages). But i Keep blowing out tires. I have had the car for about 4 months now and have replaced 3 tires already (always in the front) Has anyone else expirenced this problem? I am thinking about purchising the original 17" because to replace the tire every 5 weeks is getting to be annoying.