I believe the original HURST wheels were only available in 14". I have a very nice set on my 67 GTO that I'll switching over to my 68 Firebird soon to see how they look. The wheels are stunning--I get tons of compliments on mine. But they can get pretty expensive, especially if you don't know a lot about them when you buy. There are several different variations on the wheel (e.g, shank shape, thickness, bolt pattern, spoke finish), trim rings, provisions to attach the trim rings, center caps, and lug nuts. There are lots of mismatched sets for sale and sets with wheels with modified bolt patterns. You have to be really careful when buying these wheels.