alright im thinking of buying 3 chrome zr1's off of someone local, he said they came off of his ss, but they dont say gm anywhere, does that mean that they are replicas? also i asked waht the offset of them were, he read the back of them, one said "56mm", one said "50mm" and the other "54" with no "mm" at the end, do you think the 54 is not the offset and maybe something else? if thats not the offset , anyway of finding out what it is?whats a good offset for the zr1's on camaros, would the 56 go on the front or back, 50, front or back? do you think that if the "54" is a 54mm, that a 56 and a 54 together would be ok? then 2-50mm for the other pair? hopefully that wasnt to confusing, please give me your thoughts, thanks

 

I know that GM does stamp their wheels, but I have seen authentic ZR1's with no GM stamp.

Another thing to look at is that they ARE NOT 9.5" wide. Authentic's are 9" wide.

As far as the offset goes I'm not sure of stock offset. I have 56MM up front and 50MM out back then again I have 17x11's on the rear not 17x9's.

 

ya his are 9.5's , so they arent authentic for sure, does anyone know about the offsets?

 

SLP lists their 17"x9" wheels with a 2" offset, which is 50.8 mm.