howdy.
i was just surfing my local online ads website and i came across these.

http://www.usednanaimo.com/classified-ad/7841755

would they fit or would i need new hubs with a different bolt pattern?

Different bolt pattern.....5x115mm, I believe.

there 5 X 4 3/4

They are 16x8 and I have been told by the local tire shop to not exceed a 7.5, best would be a 7

Trans Am wheels first off have a bolt pattern of 5 X 4.75"
Second they are for RWD which uses a different offset then the FWD style wheels used on a Fiero. Typically FWD wheels use a positive offset and RWD uses 0 or negative offset.

The offset of the T/A wheels will move the center of the wheels outboard. This will put undo stress on the bearing hub and kill it in short time.
Not to mention it will ruin the handling of the car.

Don't use RWD wheels on a FWD style suspension set-up.

[This message has been edited by Oreif (edited 05-01-2009).]

Also Trans Am GTA style Front lace wheels have different off-set than the rear. I don't remember what it is right off hand but all of the 16 inch 3rd gen wheels had this to be able to fit the 245/50R16 tires under them. My 16 inch IROC wheels are the same way (I owned a GTA at one time so thats how I know this).

Shelby

[This message has been edited by ARFiero (edited 05-01-2009).]

The Trans Am bolt circle is 5 on 4.75", NOT 4.50"

quote Originally posted by Isolde: The Trans Am bolt circle is 5 on 4.75", NOT 4.50"

Opps, Thanks.
I change my previous post.

Maybe im overshootin a little here, but the offset isnt THAT big of a difference it seems to me? The rear wheels on the 88's and all 4 GT wheels on other years seem to have a slight offset to the rear. I wanted to do the same thing to my Formula for the rear. But, as mentioned, different bolt pattern. Anyway I was only curious.... )

ahh. thanks for the info. i did not know about the differences between RWD and FWD rims.

quote Originally posted by Flyboy81: Maybe im overshootin a little here, but the offset isnt THAT big of a difference it seems to me? The rear wheels on the 88's and all 4 GT wheels on other years seem to have a slight offset to the rear. I wanted to do the same thing to my Formula for the rear. But, as mentioned, different bolt pattern. Anyway I was only curious.... )

Going from a positive offset (Fiero wheels) to a negative offset (Firebird/Trans Am wheels) is a very big difference.

I guess I just never really noticed the difference in the wheels on the 2 other than being a little wider.

Just for the record the 4th gen Trans Am switched to a FWD offset, even though they were still RWD.

The bolt pattern is still wrong, but if you adapt te Fiero to the correct bolt pattern the wheels will look correct from an offset standpoint anyway.

How did they get them to fit the '90 Prototype or are they the same wheels? They look it in the pics that I've seen.

interesting info.
maybe the 90's prototype had 4.75 bolt pattern?

quote Originally posted by joshh44: interesting info. maybe the 90's prototype had 4.75 bolt pattern?

Interesting question. I'm inclined to say no, yet those wheels never appeared anywhere else in the 5 x 100 family.

quote Originally posted by kyunderdawg: How did they get them to fit the '90 Prototype or are they the same wheels? They look it in the pics that I've seen.

If I recall correctly, I thought the ones on the prototype were the Bonneville wheels painted black.

quote Originally posted by Oreif: If I recall correctly, I thought the ones on the prototype were the Bonneville wheels painted black.

They look to have a negative offset hence the deep lip.

Found a pic......'90 Prototype. The prototype is just missing the center caps.





GTA....

[This message has been edited by kyunderdawg (edited 05-03-2009).]

Bonneville rims are 5 x 115 so they would have only fit the prototype if the hubs were different.

yeah you can really tell the deep lip on the GTA.
i like the deep look.
i would like to have the GT rims but i would like a bigger rim in that style. keep it stock looking. but a bigger rim.

Well from what I can tell these are on the Delta 204t Fiero. https://www.fiero.nl/forum/Forum1/HTML/077264.html (scroll down a little)
It says they are 16s, so I'm guess'n these are the rims. I would like to imagine they used a form of spacer? Or they had them drilled from the factory 5x100... I'm hoping its a spacer thing or something ^.^ 9" wide rims would look sick from the rear