Help! would these fit on my M ?

[Philipangoo]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=7922659705

its a set of 18 x 8.5's

Front are 235/40ZR18 91W

Back are 255/35ZR18 90W

Im not sure how to tell besides putting htem on my car then seeing if they rub. I have a feeling 255 is pretty thick.

[weespeed]

I'm running 255 in the rear and it rubs. I had to roll the fenders, and it rubs with passengers and if I hit some bumps. My car is pretty low where the rear tire tucks.