Thanks, ronin. I am on a "no line" base 328i. It has 17" wheels and Coti runflats.
Just trying to make up my mind if I should "shelve" tires for later (next year) or shelve the m-perf suspension. I do feel the body roll a lot, and would go for the one of the two that gives the biggest difference. Will have to go with guesswork, as there's no way to test drive a base model with and without the m-perf, and with / without just tire upgrade.
Also, would a tire upgrade would really help if I stuck wth the 17" size? If so, which tires?
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