I currently have 245/45/17 on front with 17x8 (4.5BS) rims and 255/55/17 back of my 68 firebird. The front barely rubs on tight turns. The backs usually only rub on angled driveways. I usually don't have issues.
All that said, I'm going down to 15x8 all around with 235/60/15. The 17's turned out to be just a little too big for my taste.
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