19x10.5 in front of a gt/pp

SR56 said:

I'm running 19x10 squared w/35 offset. 295/35 Continental ExtremeSport Contact. Fits perfect.

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Yes I suspect that 10.5, +35, 295s is the limit for a truly square setup that fits under the fenders. Maybe 305's if they run small.

Grintch said:

Yes I suspect that 10.5, +35, 295s is the limit for a truly square setup that fits under the fenders. Maybe 305's if they run small.

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I was warned on going 10.5 in the fronts. Almost did it, but I'm good.

sigintel said:

Never use "add on" Aluminum spacers that result in a hidden nut sandwiched between the wheel and hub.

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Why not? I was considering Going 305 square with https://lmr.com/item/EIB-S9042506/eibach-2015-mustang-wheel-spacers-25mm for spacers for occasional track use. Does it add to much stress to the hub or something like that?

JmalB said:

Why not? I was considering Going 305 square with https://lmr.com/item/EIB-S9042506/eibach-2015-mustang-wheel-spacers-25mm for spacers for occasional track use. Does it add to much stress to the hub or something like that?

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Typically if spacers are being run they "should be" slip on and you would have extended studs. I ran the exact spacers you linked on track with my car several times and never had issues.

JmalB said:

Why not? I was considering Going 305 square with https://lmr.com/item/EIB-S9042506/eibach-2015-mustang-wheel-spacers-25mm for spacers for occasional track use. Does it add to much stress to the hub or something like that?

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Two bolted joints in series are much weaker than one.

I don't even like standard through spacers, and the wider they get the less I like them. 20mm+ is solidly in the get the right offset category for me. Especially as having extended 14mm studs installed is pricey.

thanks guys for the info putting in an order for apex 18x11, arp studs and some spacers for the front of the mustang

If you're going to DIY the stud replacement, there is a way to draw the studs up square and tight that does not require an impact tool (a standard ratchet in 1/2" drive provides enough leverage).

Impact tool or not, you'll want to check lug nut tightness a couple of times after a little driving to make sure that all of the studs got fully seated. Sometimes even the studs that come installed in new hubs aren't pulled all the way down.


How much wheel to strut clearance are you guys looking at with either +55 wheels and 25mm spacers or +50 wheels and 20mm (+30 effective offset)? It'll be slightly different for different wheel diameters.

Edit - ↑↑↑ for 10.5" wide wheels.


Norm

We are a bit late to the party here, but wanted to chime in and answer any questions that arise.

A true rotatable square setup using one wheel width and offset on all four corners of the car really becomes quite valuable to track enthusiasts. Not only will the ability to rotate wheels and tires on all four corners of the car help with reducing running tire costs, but should a wheel or tire become compromised at a track event, you only need one spare to satisfy any corner of the vehicle. A lot goes into preparing for a track or race weekend, and that last thing you want is to leave the track early due to something as lame as a compromised wheel or tire.

You can absolutely run true square fitments on the S550 chassis utilizing 9.5", 10", 10.5" or 11" wheels in both 18" and 19" diameters, however while some fitments will be bolt-on and go, more aggressive wheel and tire widths will need the right supporting modifications - i.e. adjustable camber plates and spacers at the front axle for proper inner strut clearance.

When choosing a wheel, enthusiasts equipped with the PP or aftermarket BBK's looking to run 18's will need to validate barrel and spoke clearance. Our 18" EC-7 wheel was developed from the get-go to offer massive brake clearance so that enthusiasts weren't forced into running larger and heavier wheels.

Deciding which square fitment is right for you really comes down to how you will use the car, what tire type and size you would like to run, and what supporting modification you are or aren't willing to do. Regardless of which wheel and tire specs you go with, I would urge every performance driving enthusiasts out there to install adjustable camber plates, as this modification has a huge impact on the way the car performs, and they really pays for themsleves in the form of tire longevity.

Using our EC-7 Mustang wheel specifications as examples:

18x10" ET43 or 19x10" ET40 - These can be used as a square fitment without any modifications to the car as long as you are running 275 or 285mm tires. In some cases, small spacers may be required if compounds are used that run significantly wider than others. With 295's, spacers will be required. The 10" wheels would accommodate 275 - 295mm tires. Although some enthusiasts have installed 305' on the 10" wheels, we do not like the handling characteristic are prefer 11" wheels for proper sidewall support.

APEX EC-7 18x10" ET43 square
275/40-18 RE-71
Direct Fit


APEX EC-7 19x10" ET40 square
285/35-19 Bridgestone RE-71R
Direct Fit (same on S550)


APEX EC-7 18x10" ET43 square
295/35-18 tires Yokohama A050
15mm spacers



18x11" ET52 or 19x11" ET52 - These wider wheels can be used in a square fitment when accompanied with extended wheel studs and spacers up front, as well as adjustable camber plates. Spacer thickness and camber requirements will depend on suspension type, vehicle ride height, and tire brand and size, although 25mm spacers are most commonly used. The 11" wheel would accommodate 295 - 315mm tires.

APEX EC-7 18x11" ET52 squre
295/35-18 Hoosier R7
20mm spacers


APEX EC-7 19x11" ET52 square
305/30-19 Nitto NT01
25mm spacers



Keep in mind there are suspensions out there that really hurt inner clearance for wide wheels and tires, and other like the Cortex JRi offset coilovers that actually buy you more inner clearance. Even if you find another S550 out there running your desired wheel specifications, suspensions, ride height, alignment settings and tires vary from car to car, so it is important to consult with an expert before finalizing a wheel purchase to ensure everything jives.

- Ryan

Norm Peterson said:

How much wheel to strut clearance are you guys looking at with either +55 wheels and 25mm spacers or +50 wheels and 20mm (+30 effective offset)? It'll be slightly different for different wheel diameters.

Edit - ↑↑↑ for 10.5" wide wheels.

Norm

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This data is going to be difficult to extract, or more specifically the data may not be meaningful to you unless you are running the same tire specifications, suspension etc. as the individual supplying that info. It is a game of millimeters when it comes to brake and strut clearance as you know, and there are too many contributing factors which vary from car to car.

- Ryan

I'm not looking for minimums here (I've got a fair idea how close I can shave strut-side clearances ;) ). Just ballpark numbers for wheel or tire clearances that don't make people nervous about rubbing on the inside.


Norm