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Discussion Starter #1
Long story short, I'm finally restoring my GT after being hit in 2017. I won a lawsuit (and some money) and plan on first painting the car, but I've also decided to throw on a fresh set of wheels. I currently have aftermarket Bullitts (typical 17x9/10.5 setup with Mickey Thompsons) but was thinking of going with XXR 531 wheels -- 18x9.5/11.

Two questions:

What's the offset/backspacing/etc I'll need to make sure the wheels don't rub or stick out past the fenders? (Side note: I plan on having the fenders rolled and am leaning toward air suspension.)

With modifications, what's the widest I can go, front and back? I'd like to go wider after the engine build, if possible.

Thanks for any help.
 

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Discussion Starter #2
Anyone? I'm thinking 18x9.5/11 on 255/40 and 295/35 tires. Currently on Steeda sport springs. Will they fit my GT?

Also, what's the widest wheel/tire combo I can do with mods?

I'd like to make an appointment within the next couple of weeks for the paint/bodywork, so any help/links are appreciated. I'll likely be going to AA Autoworks in Los Angeles -- if anyone has any experiences with them, please let me know. I might do the paint/body/wheels/air suspension all in one shot.

Thanks.
 

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Man, i just recently sold mine. I had 265/35/18 and 305/35/18 (then dropped down to 295
303587
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. No rubbing nor did i have to fender roll. Im about 1.50 drop all around.
Not this best pictures lol. I just got mine painted last week.
What part of LA are you from?
 

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Discussion Starter #4
Nice. Those are the 18x9.5/11s? Are they flush or do they poke out past the fenders? A couple images didn't show... I'm thinking the hyper silver - car is black. I'm in the West LA area... are you In LA? Where'd you go for the paint?
 

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Yes. They were 9.5/11. They lined up perfect with the fender. I was running Toyo Proxes at the time. Now i have continental extreme contact. They don’t run as wide as the Toyos. I used to live in the SGV. I worked in South LA for a few years. Believe it or not, i took it to Maaco. They actually did a really good job!
 

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Discussion Starter #6
Yeah I also plan on going with the Continentals. Did F/R both have 20mm offsets? I did some more research and found someone who had this setup, with 20mm offsets F/R. I'm debating on going the cheap route on the paint lol.

Why did you end up getting rid of your XXRs? Just curious.
 

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Yes they were.
i honestly got tired of them. I wanted something gloss. I came across a sweet deal on some used Rovos Durban (i know they’re played out) but i always liked them since day one.
 

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Discussion Starter #9
Looks great! I also plan on doing the Bullitt skirts, but shaved versions from a place in NV. Do you still have the GT bumper?
 

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I think i know what company you’re talking about. They have a shaved cobra bumper i have my eye on. Or i may just get a carters custom diffuser for the rear. I got rid of that bumper a long time ago lol.
 

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Discussion Starter #11
I meant the rear bumper. I'm converting to a 03/04 Cobra front end, Bullitt sides, GT rear sans spoiler -- wish they made the 03/04 Cobra bumper with the Mustang lettering. Might go platinum with the XXRs. I have an appointment in a few weeks for the paint/body work. They said it'll be ready 2-3 weeks after that. Might also do air but it's stretching the budget for now. I'll post pics.
 

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Wider isn't always better. A larger 275 wide like a BFG is PLENTLY for the street and will sit flush on a 10" wide rim perfectly. You go much wider than 10-10.5" rim you need to start messing around. Not worth it for literally 0 performance gain... I personally like 18x9 all the way around. I can run 275s on all 4 corners and rotate them and it handles better.
 

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Discussion Starter #15
Wider isn't always better. A larger 275 wide like a BFG is PLENTLY for the street and will sit flush on a 10" wide rim perfectly. You go much wider than 10-10.5" rim you need to start messing around. Not worth it for literally 0 performance gain... I personally like 18x9 all the way around. I can run 275s on all 4 corners and rotate them and it handles better.
I agree, but I guess I'm also going for the look. I already ordered the wheels/tires -- think I'll have fitment issues?

I do plan on doing a build in the next year or two, so at least then I'll be able to better utilize the wider setup. That said, I actually want to go forged and even wider at that time. Would you happen to know the max front/rear wheel/tire size I could fit with modifications?
 

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You ordered 295s for 11s? They are either gonna be flush or the rim is gonna lip out. I had BFG 295s on a set of 10.5" wides once and it was CLOSE. 255 on a 9.5 is going to be real close as well, probably too narrow. Honestly if those are the sizes you ordered I hope they run wide or the car is going to have a "hella flush" look...

That said, I had a set of BFG 235/45/18 on some 18x8 front rims and they fit PERFECT because BFGs do run huge. That was the same setup with the 275/40/18 out back that fit amazing as well. Really depends on the brand and the section width because it does vary so much.
 

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Discussion Starter #17
You ordered 295s for 11s? They are either gonna be flush or the rim is gonna lip out. I had BFG 295s on a set of 10.5" wides once and it was CLOSE. 255 on a 9.5 is going to be real close as well, probably too narrow. Honestly if those are the sizes you ordered I hope they run wide or the car is going to have a "hella flush" look...

That said, I had a set of BFG 235/45/18 on some 18x8 front rims and they fit PERFECT because BFGs do run huge. That was the same setup with the 275/40/18 out back that fit amazing as well. Really depends on the brand and the section width because it does vary so much.
Yeah, I saw a couple pictures of what was supposedly the same combo and it seemed OK, but I admit the pics could've been better. The tires are Continental Extreme Contact DWS06. I thought of going with 265/40 and 305/35, but that's when I started thinking about the performance value -- tires can be damn expensive.

What about the fitment issue of going wider? How wide can I go before I have to do other modifications? I'll keep the wheels for another round of tires after I do the engine build.
 

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295 is plenty wide for a street car, you don't need anymore than that. Remember at some point you start losing traction from going wider because you are distributing the weight over a larger area so less pressure per square inch of tread. I run 275s on all 4 corners. Handling is way better, it hooks great and I can rotate. Run spacers with extended studs out back to get rid of the tucked look.
 

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Discussion Starter #19
Well, the wheels are arriving at my office on Monday. I'll have to keep my fingers crossed. Worst case - I'll get some use out of them, sell them, and maybe run spacers in the future with a different set. I know I won't get much performance benefit, if any (especially on an old bolt-on GT), but I really just love the look of the wider wheels/tires.

Anyway, I'll post pics when they come in.
 

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Discussion Starter #20
Everything seems to look good so far. Hard to get pics in my apartment, but I’ll take more pics when the car’s done. Hopefully they’ll be ready for me soon.
 

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