You need a 13.0 - 14.0 inch wide rim to fill original fiberglass GP IV flares depending on the backspacing you select. The 335 17 is narrow in width compared to the 345/35/15 I run. Measure multiple times and cut once to get the right look. I have seen 335 tires on too narrow a rim with literally no back space attempting to fill the flare. Remember the factory GP IV cars use a 14” rim.
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