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Old 01-22-2012, 04:51 PM   #1
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Tire size question

Will 275/40R17 fit with out problems on the front 9" rim? I have a 95 cobra that needs tires in the front and I would like to rotate my rear tires that are in good shape to the front and get 315's for the rear.
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Old 01-22-2012, 05:27 PM   #2
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Think so. I've seen evidence that maybe it'll rub inside maybe. There are rub marks behind and inside my wheels, was wondering if someone had 275/40's up front.
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Old 01-22-2012, 07:51 PM   #3
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Re: Tire size question

There is an article in the Mustang Articles section on Mustang Wheels & Tires.
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Old 01-22-2012, 08:16 PM   #4
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Quote:
Originally Posted by deadsp0t
Think so. I've seen evidence that maybe it'll rub inside maybe. There are rub marks behind and inside my wheels, was wondering if someone had 275/40's up front.
I have 275/40/18s. Up front

---------- Post added at 08:16 PM ---------- Previous post was at 08:16 PM ----------

They fit with no problem. I didnt see what size rim u had i hope this helps.
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Old 01-22-2012, 08:22 PM   #5
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17's

---------- Post added at 02:22 AM ---------- Previous post was at 02:21 AM ----------

Quote:
Originally Posted by Trojan Horse
There is an article in the Mustang Articles section on Mustang Wheels & Tires.
I might be overlooking it but I couldn't find the answer in this link
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Old 01-22-2012, 10:02 PM   #6
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Re: Tire size question

Quote:
Originally Posted by jhagan1980 View Post
17's

---------- Post added at 02:22 AM ---------- Previous post was at 02:21 AM ----------



I might be overlooking it but I couldn't find the answer in this link




The 99-04 Mustangs are pretty much a "re-skinned" 94-98.
I believe most wheel fitments will be the same.
I'm not to sure about the statement in the FAQ at the bottom.
I don't think the backspacing is that much for the front wheels too.

Still not the exact answer you were looking for, I'd go with what the guys who have them are telling you.


Quote:
1999-2004 Fitment Information
Front Wheel Fitment:
Your frontspacing should be around 3.00 inches. Ford’s OEM rims seem to range mostly between 3.07-2.89 frontspacing. As you lower your car your front wheels tuck in more and more due to the McPherson strut design they use. Keep this in mind. The widest wheels you should use on the front of your vehicle should be 9 inches. You may still experience some rubbing. The 2003/2004 Cobra use rack limiters to prevent rubbing. This is not a major issue though.
Rear Wheel Fitment:
If you want the maximum frontspacing of your rims without having to roll your rear fenders then you should have 3.5 inches of frontspacing. If you want fender flush then you want to have 4.0 inches of frontspacing. You will probably have to roll your fenders for this.
If you have an IRS (Independent Rear) equipped vehicle you may can get by with a little more as the tire tuck in as they come up much like the front wheels will. The rim will not be flush with the fenders, but after you install tires they should be very close to flush. Some need 4.25 to become perfectly flush, but most want a little but under the fender for appearance. So 4.25 is the maximum unless for a normal sidewall tire.
An 11 inch rear rim with a 7 inch backspacing is about the limit for the size of rims you can run on the rear. You may have to either flip or eliminate your quad shocks if you have them for this. A seven inch backspacing is pretty much all you can get out of it. If you have an IRS (Independent Rear) vehicle then you will need to look into shaving your IRS rear frame bolts or installing button head bolts to clear over a 6 inch backspacing rim. Having your car lower than stock or larger than 17 inch rims may gain you a little extra room here.
Frequently Asked Questions
Q. Will a 17 by 9 rim fit on the front and rear of my 94-04 mustang?
A. Yes, a 17 by 9 rim will fit perfectly fine as long as its backspacing and offset are set correctly, the backspacing for a Ford 17 by 9 mustang rim is 5.95-6.11 inches.
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Old 01-23-2012, 01:28 PM   #7
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Re: Tire size question

I currently have 275x40x17s on 17x9 cobras in the front of my 94.
It'll work but they DO rub. Nothing drastic, but definitely noticeable.
The tires I have are Wide Ovals, jsyk.
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Old 01-23-2012, 01:50 PM   #8
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That's what I have, rubs a little bit, doesn't damage anything.
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Old 01-23-2012, 02:01 PM   #9
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Re: Tire size question

So you could probably use some "Rack Limiters" and prevent the rubbing?
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Old 01-23-2012, 02:02 PM   #10
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Quote:
Originally Posted by Trojan Horse
So you could probably use some "Rack Limiters" and prevent the rubbing?
I believe so
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Old 01-23-2012, 02:44 PM   #11
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Re: Tire size question

Quote:
Originally Posted by Trojan Horse View Post
So you could probably use some "Rack Limiters" and prevent the rubbing?
the 03/04 cobra has them, not sure how you buy them~ maybe check with tousleyfordparts.com
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Old 01-23-2012, 03:57 PM   #12
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Re: Tire size question

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Originally Posted by SpectorV View Post
the 03/04 cobra has them, not sure how you buy them~ maybe check with tousleyfordparts.com
You can get them from LRS - Steering Rack Limiters
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Old 01-23-2012, 04:52 PM   #13
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Glad I read this cause I just noticed last night. I have 17x9 cobras on my 90gt and they rubbing a little found that out when changed the rack. But my rack was bad I gonna check when I put wheels back on
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