spare tire size?are jacks from other cars the same? (Page 1/1)
richard in nc JUL 22, 10:13 AM
my car didn't come with a jack or spare tire.im assuming i can find a spare tire from another gm car if i know the tire size.i need it to fit in the fiero spare holder.anyone know if other gm cars had the same jack?i plan on taking my old rotor with me to verify the bolt pattern.
Spoon JUL 22, 06:48 PM
This may help.

https://sparetire.com/Pontiac/Fiero/

Spoon

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"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut

theogre JUL 22, 07:22 PM
T125/70D15 w/ 5/100 lug pattern rim.
likely many old GM have same spare.

most spares are not exact same diam as normal tires. Is part of Why most only rated < 50mph and as few miles of use even then so can drive to next tire shop.
Many don't recommend the spares are drive axle whenever possible because makes big problems w/ the dif if must drive more then a few miles to get to tire store. That a problem for cars w/ stagger sizes and flat is back tire for Fiero.

Tirerack and some others can sell complete spares or just the tire if have right rim.
Email them as often not listed w/ normal tires online.

Fiero may not share a jack w/ other models.

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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

richard in nc JUL 22, 07:56 PM
.ogres post says 15 inch tire.i actually have a 125/70/15 gm spare that i just tried.perfect fit.too bad the bolt patterns wrong.thanks.

[This message has been edited by richard in nc (edited 07-23-2023).]

cvxjet JUL 22, 10:39 PM
I converted my front brakes to 88 w/12" C4 Vette discs (1985 SE V6)...Had to go to bigger diameter spare WHEEL but (Obviously) the same outside diameter tire...I found that a spare from certain Subarus will fit- both as a spare and in the spare tire-well. The size of the tire is T115/70R-16...Critically, the center hub diameter is slightly smaller than Fiero hubs, so you do need to bore it out a small amount. I actually used a drill with a sanding drum...took just a few minutes of work.

I haven't the exact info on which Subaru spares fit- but if you go to the JY with a spare hub, you can probably find one that will fit.

[This message has been edited by cvxjet (edited 07-22-2023).]