I have to agree, tires do help. I have a 2006 330i w/Sport Suspension and have been running RE-11's for some time now. I'm still running the sport size widths, 225 / 255 x 18 at 33 and 36 psi (f/r), good car balance, turn-in and rotation, and even tire wear, much better than the RE-10's. The tires help almost everything .. braking, accelerating and cornering. Skippy school is a blast and you could also do a track day up north with a club like BMW CCA at Willow Springs.
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