Quote:
Originally Posted by kmarei
if it makes no difference then why doesn't the car come with 245 in the back?
would make it better in the rain
and why do the M cars come with wider rubber than the lower end models?
that applies to most brands actually, not just BMW
based on my experience
wider tires = more grip
and wider tires means i can use a lower psi which means bigger contact patch
so instead of 33/35psi i can maybe use 31/33
also more comfortable
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I'm talking about for Winter driving condtions. The shape of the contact patch is different, but not its area, depending on tire width. And it's well-known that for rain or snow a longer, narrower patch is better than shorter and wider. Improved transient response is big reason for wider, lower profile tires as well, which is of less importance in extreme conditions.