17" versus 14" tires

michiganpat said
that's the size (255/50R17) I used on my old 5th ave back in the day and am leaning towards on my duster after the big bolt/disc brake conversion.....235/55R17 is a fairly common size (standard tire size on mid '00 mustangs, IIRC)

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Seems to me the most common 17" tire for a Mustang is a 245/45R17. That's what I run, on '97(?) GT wheels. Works well, no rubbing on the fender or suspension. But I am running a Cobra rotor based BBK, so it is like I am running a small spacer, too.