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90 Prototype tires and rims by fierobear
Started on: 07-24-2003 07:29 PM
Replies: 20
Last post by: hyperv6 on 11-07-2003 07:10 AM
fierobear
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Report this Post07-24-2003 07:29 PM Click Here to See the Profile for fierobearSend a Private Message to fierobearDirect Link to This Post
For full resolution versions (around 660K), go to: http://f1.pg.briefcase.yahoo.com/fierobear
Pictures are organized in folders

Front rim

Front tire size

Rear rim

Rear tire size

[This message has been edited by fierobear (edited 07-24-2003).]

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nick2x88
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Report this Post11-06-2003 12:58 AM Click Here to See the Profile for nick2x88Send a Private Message to nick2x88Direct Link to This Post
205-55-16 front,
225-50-16 rear.

probably a 16x6 front, and a 16x6.5 or 16x7 rear.

Oh, I wish i had a set....

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88 4cyl 5spd & 88 Formula 5spd Formula is SOLD :( One day I'll have another...

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Fierokid87
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Report this Post11-06-2003 04:27 AM Click Here to See the Profile for Fierokid87Send a Private Message to Fierokid87Direct Link to This Post
hey guys if no one knew this before I found out the rims on the 90 Prototype are made of like a High strenth plastic. Not aluminum. the President of the Cleveland Fieros gave me this info. And he got that info and also got to see one up close from a guy who has one of the extra rims from the prototype. I guess other car companies were experimemting with the plastic rim idea too.

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tednelson83
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Report this Post11-06-2003 06:52 AM Click Here to See the Profile for tednelson83Click Here to visit tednelson83's HomePageSend a Private Message to tednelson83Direct Link to This Post
those look like the rims on my 87 GT.

------------------

1985 Pontiac Fiero 2.5 SE, 214,000 miles and still runing!!!
* 6x9" speakers in the dash *
* 4 corner KYB * sequential turn signals * G/A brakes on rear only * Dodge Shadow Spoiler

more pics of my 85 can be found here

1987 Pontiac Fiero GT, 131,000 miles! not running.....yet!

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8Ball
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Report this Post11-06-2003 08:38 AM Click Here to See the Profile for 8BallSend a Private Message to 8BallDirect Link to This Post
It can't be a 16.6 inch rim. The tire says Do Not mount on a 16.6. So it must be a 16.5 or lower.
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FieroMonkey
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Report this Post11-06-2003 10:45 AM Click Here to See the Profile for FieroMonkeySend a Private Message to FieroMonkeyDirect Link to This Post
 
quote
Originally posted by Fierokid87:

hey guys if no one knew this before I found out the rims on the 90 Prototype are made of like a High strenth plastic.

i have never heard of plastic rims before, but when you look at the second pick posted above, at the silver edge of the rim. it looks remarkabley like there is clear coat over aluminum with the tell-tale clearcoat crazing we all know and love

[This message has been edited by FieroMonkey (edited 11-06-2003).]

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GTFiero1
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Report this Post11-06-2003 12:19 PM Click Here to See the Profile for GTFiero1Send a Private Message to GTFiero1Direct Link to This Post
how come the tires are taller in the front than in the rear??
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Stinkin_V8
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Report this Post11-06-2003 01:54 PM Click Here to See the Profile for Stinkin_V8Send a Private Message to Stinkin_V8Direct Link to This Post
 
quote
Originally posted by GTFiero1:
how come the tires are taller in the front than in the rear??

They were probably trying to offset the different tread widths.. If my tire height calculator works right, then:

205-55-16 front = 24.878 inches
225-50-16 rear = 24.858 inches

Looks pretty close to me.

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Raydar
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Report this Post11-06-2003 02:21 PM Click Here to See the Profile for RaydarSend a Private Message to RaydarDirect Link to This Post
 
quote
Originally posted by tednelson83:

those look like the rims on my 87 GT.

The centers look kinda like the regular GT wheels, but the outer rims look more like Trans AM GTA pieces.

Sure wish I could find a set.

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Raydar

88 3.4 coupe. 17s, cut springs 'n all.

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Raydar
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Report this Post11-06-2003 02:24 PM Click Here to See the Profile for RaydarSend a Private Message to RaydarDirect Link to This Post

Raydar

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quote
Originally posted by 8Ball:

...The tire says Do Not mount on a 16.6. So it must be a 16.5 or lower.

I think that means a 16.6 diameter truck rim. (Not the "pretty" ones. The "heavy duty" ones.)

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nick2x88
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Report this Post11-06-2003 03:44 PM Click Here to See the Profile for nick2x88Send a Private Message to nick2x88Direct Link to This Post
Right. what I meant is that the fronts are probably 16" diameter by 6" wide, and the rears are probably 16" diameter by 6.5" or 7.0" wide.

 
quote
Originally posted by 8Ball:

It can't be a 16.6 inch rim. The tire says Do Not mount on a 16.6. So it must be a 16.5 or lower.

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88 4cyl 5spd & 88 Formula 5spd Formula is SOLD :( One day I'll have another...

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fierogt3
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Report this Post11-06-2003 04:32 PM Click Here to See the Profile for fierogt3Send a Private Message to fierogt3Direct Link to This Post
i think the actual rim is metal, but the inside part is plastic

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FieroGt3 Website! Check it out.

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tednelson83
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Report this Post11-06-2003 04:47 PM Click Here to See the Profile for tednelson83Click Here to visit tednelson83's HomePageSend a Private Message to tednelson83Direct Link to This Post
plastic rims? sounds like a stupid design if you ask me! plastic gets brittle and breaks. and on a sports car that will get thrown around i wouldnt want to be riding on plastic.
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red85gt
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Report this Post11-06-2003 06:23 PM Click Here to See the Profile for red85gtClick Here to visit red85gt's HomePageSend a Private Message to red85gtDirect Link to This Post
My 79 Camaroe(sp?) Berlinetta had aluminum/rubber rims. The rim was aluminum and it had a rubber webbing for the center. Still looked good after 20 years. Rubber is durable and wont rust. Also minor curb hits wouldent kill the rim because the center would flex.

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85 GT 4 speed 2.8L auto X'er

[This message has been edited by red85gt (edited 11-06-2003).]

[This message has been edited by red85gt (edited 11-06-2003).]

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hyperv6
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Report this Post11-06-2003 09:32 PM Click Here to See the Profile for hyperv6Send a Private Message to hyperv6Direct Link to This Post
Ok here is the whole story on the Plastic wheel that I held in my hands last Sunday.
First the wheels pictured here are not the plastic wheels. The plastic wheel is of a 5 thick spoke design with 10 thin spokes in between with Pontiac engraved on on spoke. They are silver in color. If anyone has pictures of the red clay GTP they are on it in some pictures. I have seen these wheels before in 1985 when a Goodyear tire engineer had them on his 1985 GT. The car is still around and the wheels are still on it as of about 2 years ago. If I can stop him I will buy them if I can. I beleive even though his are the same style his were aluminum.
When I was told of a plastic wheel on the phone I assumed it was a mock up. Well when I got there I found it was a usable wheel. We know this much, they were looking into the wheels but we are not sure why. This wheel is not much if any lighter than an aluminum one but there is slightly less unsprung weight involved. Cost might be cheaper but we are unsure how much. Shelby was looking into plastic wheels in the 85-87 time frame for the Shelby CSX Shadows but they were never offered by Mopar.
There is only one Plastic wheel that we know of and no it's not for sale. The gentleman who has this does not want to be Identified, Sorry! If I can post a picture later I will. I have a front, back and side view. Needless to say I was shocked and never imagined something like this was out there. by the way when I post the pictures the Front looks like an aluminum wheel. I had to knock on it to hear the plastic thud and the back has a plastic marbled look.
By the way I also found from this gentleman and Jim Mattison from GM historic services that GM considers the GTP a 1989 not a 1990 as I have thought. They also as of 1985 were going to offer 4 models, a coupe, SE [which may have been changed to a Formula later], GT and a GTP. The GT was a stripped down GTP much like a Formula is to a Trans Am. I will post more on what paperwork I saw later.
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hyperv6
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Report this Post11-06-2003 09:42 PM Click Here to See the Profile for hyperv6Send a Private Message to hyperv6Direct Link to This Post

hyperv6

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This wheel was on the 1989 GT drawing while the black one that was on the red car was on the 1989 GTP drawing with a gold lace center.

[This message has been edited by hyperv6 (edited 11-06-2003).]

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TaurusThug
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Report this Post11-06-2003 09:43 PM Click Here to See the Profile for TaurusThugSend a Private Message to TaurusThugDirect Link to This Post
was the GTP going to be supercharged? i hate GM for pulling the plug, no super hot rod stock fieros because of them!!!

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'86 Fiero GT
www.KylesFiero.tk

[This message has been edited by TaurusThug (edited 11-06-2003).]

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hyperv6
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Report this Post11-06-2003 09:48 PM Click Here to See the Profile for hyperv6Send a Private Message to hyperv6Direct Link to This Post

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hyperv6
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Report this Post11-06-2003 09:55 PM Click Here to See the Profile for hyperv6Send a Private Message to hyperv6Direct Link to This Post

hyperv6

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No supercharger or turbo. At least in the 1989. The 24 valve 3.4 was what they were looking at and that is what is in the GTP. If the car had lived It is hard to say what may have been. The 60 degree 24 valve engine was a dud for GM and they droped it only after a few years. The Quad 4 was listed as replacing the Iron Duke. The I saw paperwork was dated Feb 5th 1988 and laid out different ways to save the car and the base line was kill the p car. They took the cheap way out to save money. I wish I could have copied it but I was not able.
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fierobear
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Report this Post11-07-2003 03:15 AM Click Here to See the Profile for fierobearSend a Private Message to fierobearDirect Link to This Post
FYI, GM may have been calling the prototype, or model, by different names. In the buildup video of the prototype, they always refer to it as a 90. Maybe different departments, or maybe they changed plans from 89 to 90 for the introduction of the redesign.
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hyperv6
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Report this Post11-07-2003 07:10 AM Click Here to See the Profile for hyperv6Send a Private Message to hyperv6Direct Link to This Post
Well as of today Jim Mattison who is the Pontiac historian said the GTP they have is called a 1989. The car is also now owned by GM Special Vehical division not Pontiac as in the past.
I am ok with the 1990 date since that is what I alway thought it was myself.
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