Dad is looking to buy a set of used GM ZR1's, but he's not sure how to tell the difference between OEM and aftermarket. Any clues?

Thanks
Chuck

 

Price should be a decent indicator, although not perfect. An OEM wheel will cost at least $300 per, and probably more. Replica wheels should be available for much less.

Why does he care? They all look the same.

 

I'm guessing the authentic GM wheels will have "GM" marked on the wheel somewhere. I bought some 35th Anniversary SS wheels not too long ago and they have "GM" imprinted into every wheel as do all of my 16x8 "fat spokes" that are on my car now.

 

Yes, they should have the GM marked on it. If it doesnt, then its a aftermarket wheel an not a OEM.

 

they will have a GM stamp on them near the valve stem hole

 

GM wheels are lighter then the replica zr1s.

 

By how much?

 

Well obviously its going to vary because of the different weights of replica wheels, but I imagine only a few pounds. Not enough to make a difference to me, but it makes a difference to some.