Wheel trim rings...
 

I really jumped off in it today. Found a big stack of nice trim rings at a flea market. Assuming some of them [haven't really looked too closely for numbers] are GM, what will the trick for ID be?

They are in the garage, BTW. Couldn't pass 'em up.

Re: Wheel trim rings...
 

There are no numbers on GM trim rings. Post some pics and measurements and we will help!

Re: Wheel trim rings...
 

I've only owned 2 cars in my life with trim rings and they both had the originals. SO, please pardon my ignorance. Where do I take the measurements? ID? OD? Across the inner area?

Thanks.