i used to have an 86 GT and ran 225's on the rear but were 16's and don't remember the profile, I know that with some help from a BFH you can get 245's back there.
Originally posted by Kameo Kid: if your asking about 245's on the rear? I don't think you will with stock suspension. you'll need coilovers for that much tire.
Mmmmm .... Im running 255/45/17 on the rear without any problem at all using the stock suspension in a notchback 86 GT, my rims are 17 X 7.5 all arround with 35mm positive offset. Im running 235/45/17 in the front ant the tires doesnt rub anywhere and looks awsome.
P.S. The distance betwen the tire and the strut perch with this tires its minimal, but that doesnt matter, because the perch always moves at the same time as the tire, so the tire never touches the strut perch, no matter how close they are from each other.
Greetings ... Ales
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06:26 PM
PFF
System Bot
madcurl Member
Posts: 21401 From: In a Van down by the Kern River Registered: Jul 2003
Use a 235/45/17 for the front if the rim is 17x7.5 That will give you a 25.32 diameter and enough clearance for stock front suspension. Anything over 26.0 will rub big time on bumps in the road. This should result in 2.5 (man fingers) gap.
Want Visuals? They will look like ballons or Apollo moon rover tires. I had 235/45/17 on #11 in the front many, many years ago.
[This message has been edited by madcurl (edited 09-20-2005).]
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06:42 PM
Tina Member
Posts: 2858 From: At an elevation of 8564 feet. Registered: Nov 2000
I have an 88 Formula with 17 x 7 rims with 225/55 all the way around. There is still room in the rear for wider and taller tires. I guess it depends on the offset and a few other things though. I wouldn't go any smaller than what I have on, gives the car a nice look, stiffens the steering somewhat, but it looks sweet so who cares .
Just a caution, after you have tentively decided on a tire size, using the tire calculator, get the specs for the actual tire that you think you want to buy and verify OD, section width, tread width. The calculators are a great aid but the actual tires won't necessarily match the numbers that the calculator gives you.
------------------ RickN White 88GT 5spd White 85GT Auto
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12:43 AM
Tina Member
Posts: 2858 From: At an elevation of 8564 feet. Registered: Nov 2000
After a bit of pleading with our usual tire store, the owner there agreed to help us out and mount a few different 17's on the new wheels. Hopefully this way we will be able to figure out what fits and what rubs. Might even try some wheel spacers. Usually it would not be such an ordeal, but the wheels are already bought,(closeout deal, not returnable) and the certificate I ended up winning for some rubber happens to be from one of those "Chain tires stores" that once the tires are mounted are non returnable. So I got to get this right the first time.
Anyways ... if you do have 17's on a 85, would you please post the offset of your wheels along with the tire size you are running.
Thanks.
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10:27 AM
litespd Member
Posts: 8128 From: No where you want to be Registered: Aug 99
Tina, mine's an 86, but it's the same suspension that you have on your 85. I have the same wheels as KEV...Konig Monsoons, but mine are all 17X7, with a 40mm offset. I run 215/45R17's on the front with NO rub problems, and 235/45R17's on the rear. The gap between the tire and the strut spring perch is EXTREMELY tight...I can hardly get a finger between the tire and the strut...but the distance between them does not, in most purposes, change any. I check the inside sidewalls occasionally, and have never seen any evidence of the tire contacting the strut.
That being said, the 45 series tires are a very close match o.d. wise for the original 15 inch wheels and tires that were stock on my 86. They don't close up the fenderwell gap at all. The 55 series tires you're looking at should do the trick, but you probably won't be able to do the 245's without going to coilovers on the rear, which will give you more room to work with. However, be prepared for the "truck tire" comments you'll get with the 55's...
------------------ Mike...86 GT 4 Speed "Sucks to be me..."
[This message has been edited by litespd (edited 09-21-2005).]
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10:41 AM
KissMySSFiero Member
Posts: 5541 From: Tarpon Springs, FL USA Registered: Nov 2000
Personally, I'd run a 245/45r17(25.7" tall) for the rear, Maybe a 235(25.3" tall) on a 7 inch rim. Front I'd go with 215/45r17(24.6 tall) or 215/50r17(25.4" tall)
Anything taller than 26" will look bad on a fiero, in my opinion
Tire heights and widths will vary by manufacturer. Hope this helps.
However, be prepared for the "truck tire" comments you'll get with the 55's...
Bring it.
225/70/14 rear 215/70/14 front with some serious wheel gap.
Thanks for the info though. Now is yours lowered Litespd, or is it sitting e' naturel?
Tina BTW Not really technical, but ... I tried some of the colored wax on the car the other day. Not half bad. One of my co workers actually asked wether I got a new Fiero. Wear plastic gloves and grubbies though. That stuff can make a mess.
.
