Spare tire and rim size for 70 Duster

if you're looking for a source for a USED tire for a spare (which is what mine is), any hubcap equipped 92-95 Pontiac Grand Am/Buick Skylark/Oldsmobile Achieva has 185/75R14's on it.

I always think of a good spare as any tire that fits in the spare tire well, holds air and has SOME tread and no sidewall cracking.