I'm using a 335/35-17 on a 17"x11" rim for my street rims. They fit fine. I think the back spacing is within 1' of my Campy 15"x10" which came on some of the cars. I've seen a Pantera with stock rear quarters that had a 345/30-18. My car is lowered also. Can you get a wider tire than a 345?
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