I am looking at getting a new set of rims as mine are in need of refurbishment. I figured I would buy a set while I decide what I am going to do with my wheels. I have a 1986 gt. There are lots of posts about rim width with a debate between 6" and 7". Some websites say OEM size is 6, but others say the rim is a 7j. I have pulled off a rim and there are no no identifiers stamped on it other than made in Germany and some other numbers, none of which are 6 or 7. I have also read that the size was raised on the back of one of the honeycombs, could not find that either. I did clean out all of the brake dust to see if there were any stamps hiding under it. My do it yourself manual says 6" wide rims. Is there a way to confirm such as a code on the spec sticker under the front hood? I want to use my stock 215/60 and 205/60 r15 tires. Strange that I could not find a size stamped on the rim. Any help is much appreciated.

The 88's run 15x6 in the front and 15x7 in the rear. The 86-87 run 15x7 all the way around.

If you buy an aftermarket wheel, be aware of the wheel's hub bore. It needs to be at least 57.1mm

[This message has been edited by IMSA GT (edited 07-30-2020).]

In regards to hub bore, can it be greater than 57.1? I think you use hub rings then, but I am not an expert.

That is true- they are called "Hubcentric"......You can order different rings to match your hub-wheel interface.

quote Originally posted by Mct2green: In regards to hub bore, can it be greater than 57.1? I think you use hub rings then, but I am not an expert.

That's correct.

Regarding the stock Fiero "mesh" wheels...
If it has a 1" horizontal lip between the spokes and the edge of the rim, it's 7". If it does not have that lip it's 6".