tire fitting queston
tire fitting queston
Ok guys i've always been more of a performance over looks guy but with the 87 I just bought the body is in great shape, anyway my neighbor watches me work on it and today came out and said he had wheels from his old sports car he wanted to give me so im thinking ok ill take them atleast for the tires. When he rolled them out my jaw dropped 4 mint condition ssr gt3 fronts are 18x9 rears are 18x10 tires on it are pilots I believe 235x40x18 fronts and 265x40x18 rears tires are new. My question is I know the figment tread is there and I see all sorts of sizes but I don't understand offset. Can someone educate me on fitting tires and point me towards good info on that and fender rolling I would greatly appreciate it also if you know how I could fit these and don't mind sharing again u would appreciate that alot thanks guys.
Rotary Vtak
Joined: Jul 2010
Posts: 110
Likes: 0
From: Los Angeles
I think 18's are too big for the car, but some people can pull it off. You will need to pull&roll your front fenders(if no aftermarket fender)/aftermarket fender, and run with stretch & camber(if no aftermarket fender). The rear will need a pull as well.
ok i looked at the tag on the inside of the rim
Front
ssr gt-03
18x8 offset lo+49 type D
p.c.d/h 130/5
tires are michelin pilots 235/40/18
Rear
18x10 offset lo+62 type G
p.c.d/h 130/5
tires are michelin pilot 265/40/18
Pardon my questions but what does type mean and also i know i will need spacers
how do i measure for the spacers.
Front
ssr gt-03
18x8 offset lo+49 type D
p.c.d/h 130/5
tires are michelin pilots 235/40/18
Rear
18x10 offset lo+62 type G
p.c.d/h 130/5
tires are michelin pilot 265/40/18
Pardon my questions but what does type mean and also i know i will need spacers
how do i measure for the spacers.
If you do a baseline measurement and record the numbers on a piece of paper, you'll be able to figure it out.
The stock wheels (for TII) are 16x7 +40mm offset. The distance (backspacing) from the edge of the rim to the mounting surface on your new wheels should be around the same as the stock wheels to clear your suspension components. People who run wide tires on their cars try to get as close as possible to the suspension to maximize available real estate.
If this value (the backspacing) is larger, you add a spacer to make up for the extra distance. If the value is smaller (which you are not according to the wheels you described), a spacer won't make any difference except to push the wheel out further.
The next issue after that is will the wheel and tire combo clear the sheet metal. That part is entirely up to you and what you prefer aesthetically.
If you want to do a calculation before buying a set of wheels (sometimes it's just not available for you to measure), use the picture posted above.
In terms of offsets, they change as the wheel widths change. This is a little hard to grasp at first, but after a few calculations, you will see why.
Here's a resource that might be useful:
http://www.1010tires.com/wheeloffsetcalculator.asp
The stock wheels (for TII) are 16x7 +40mm offset. The distance (backspacing) from the edge of the rim to the mounting surface on your new wheels should be around the same as the stock wheels to clear your suspension components. People who run wide tires on their cars try to get as close as possible to the suspension to maximize available real estate.
If this value (the backspacing) is larger, you add a spacer to make up for the extra distance. If the value is smaller (which you are not according to the wheels you described), a spacer won't make any difference except to push the wheel out further.
The next issue after that is will the wheel and tire combo clear the sheet metal. That part is entirely up to you and what you prefer aesthetically.
If you want to do a calculation before buying a set of wheels (sometimes it's just not available for you to measure), use the picture posted above.
In terms of offsets, they change as the wheel widths change. This is a little hard to grasp at first, but after a few calculations, you will see why.
Here's a resource that might be useful:
http://www.1010tires.com/wheeloffsetcalculator.asp
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Yea I did get lucky, he owns a porsche carrera and does not like how they feel on his car. The wheels came off a 996 so the lug pattern is 5x130 allowed to our 5x114.3 luckly hr trak makes adapters starting at 20mm to help me out, only bad thing is im broke and will be for a while got alot of house bills backed up. I have pictures of the wheels even of the wheels up against the car it might just be a bit till you guys see rolled fenders and 18's tucked under the well's. So I will take pics then, meanwhile I will search for coilovers and order the spacers when I get a chance too.
Rx Bandit
Joined: Jul 2008
Posts: 232
Likes: 1
From: Fort St John, BC, Canada
dang bud, that is a hell of a hook up.. that's literally multiple thousands of dollars worth of wheel and tire right there.
it'll take some serious calculating and fender massaging to get those in there, along with those adaptor spacers you already found, but if you like the rims then go for it
i say leave the porsche center caps on too :P one more reason for non-car people to think you drive a 944 ha ha
-sean
ps: give your neighbor a high-five for me
it'll take some serious calculating and fender massaging to get those in there, along with those adaptor spacers you already found, but if you like the rims then go for it
i say leave the porsche center caps on too :P one more reason for non-car people to think you drive a 944 ha ha
-sean
ps: give your neighbor a high-five for me
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