CHEEKS13

Need some help:

I am new to the site, I have a 98 Mustang GT

I purchased 2007 Roush Rims 18x10 rears and 18x9's front

what do i need to properly set these up as far as tire sizes? wheels spacers? etc.

The tires are currently 275/40/18 rear and 245/40/18 front

I know the offset is way off from the stock SN95 wheels. I am just trying to get a straight answer, searched the internet and answers all over the place

thanks

tdcalhoun89

I don't see why those wouldn't already fit the way they are... Jazzer has link about tires on here. Might try checking the stickies and see if he has anything about fitting wheels and tires in there.

..More importantly though, lets see those wheels!!!

Jazzer The Cat

The off-set difference between the pre-New Edge SN95 and S197 wheels, is typically about 5/8" up front and nearer to 1"+ on the rears. Please give me the back-space of your NEW wheels and can tell you how much it differs. The problem one can get into up front is scrub radius. This is hard to figure out and not real comfortable running spacers up front. This is above and beyond issues of stud length on your OEM hubs.

Jazzer

CHEEKS13

I measured the Backspace, and if I measured correctly Fronts are 6" and Rears are 7.5". The rims just seem to fit a little snug on the rears when I put them on towards the inside of the tire, currently running 17x9 cobra rims with 275's all the way around, thanks for your help

LilRoush

It's more than you'll want. I'd sell and find the correct year wheels.
The S197 Roush wheels tend to ride "tucked" on the cars they are made for, and even more so when trying to put them on the SN95 cars. You'll need at least a 1" rear spacer, and even then, they won't be flush to the outter edge of the fender. Those are also very narrow tires for that wide of a rim. On my 18x9/18x10 Roush wheels (SN95 style) I run 265/35 and 295/35 (which is what Roush suggests for the car/wheel combo).

luke1333

dont know if this helps or not but here:

http://www.brenspeed.com/86-04-musta...-adaptors.html

saw this earlier today hope it helps

Jazzer The Cat

Fronts will actually fit, but probably rub on sway-bar at full-lock. Rears are gonna need at least a 5/8" spacer, to run at a normal clearance. Problem is, getting such a spacer on your ride to work. The link provided by luke, does not have any specs, but will need to swap the studs to run them. To run anything more than a 1/4" max spacer on OEM studs, will not leave a safe amount of threads for wheels. The "standard" is an equal amount of threads to the diameter of the bolt. In such a case as the Mustang, we have 1/2"x20 RH threads. So 10 full-turns is the recommended amount and wont have it with a spacer that will work with those wheels.

I am with my Lil pepe, Roush here and say that you are best off to find wheels meant for your ride. Either that, or accept a bit of rubbing up front and replace the studs out back with longer/stronger ones to accept a spacer of at least 5/8", but 3/4" would be better.

Jazzer