Steering wheel too small??

Couldn't get the '74 Dart Sport inspected today because "the steering wheel is too small." Anyone else run into this problem in your state? Aaron had it inspected for three consecutive years with no problem, now some goofball wants to make an issue out of his aftermarket Grant wheel. Its diameter is smaller than "the book" says it should be.

Can someone with a Tuff wheel tell me its diameter?

Jerry