i have 215/45 and has gotten no rubbing; at least none i know of, and i've gotten 4 ppl in my car.. also it depends on the offset of your wheels
if you intend to get your car on stock height, then i'd take 215/45 for the less adjustment to the speedo reading.. i believe with 215/45 it'd be like -0.2 difference or something, granted you got more rolling radius on the 45 than the 40, but those differences are minimal, if not completely the same
to me (and someone pls correct me if im wrong) that a slightly taller sidewall protects the alloy better... there's more rubber to absorb the road.. one reason i went with 45 profile although it's hardly noticeable, 45 sidewall should yield a SLIGHTLY better ride...
now if you are planning to lower the car (like me soon) then i'd stick with 215/40..
hope this helped... im sure others can give much better response
i like the way the 45 series look.. it fills the wheelarch nicely.. my friends who first saw it thought i lowered the car!
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