Wheel size for PP1 GT

[Horizon5.0]

I have a 2019 gt pp1 and i’m ordering custom forged wheels. i was previously looking at 20x10 +35 and 20x11 +50 for the front and rear, but now im kinda interested in going 20x11 square. do i have to worry about clearance with 20x11 +50 with a spacer and 305/30 tires? my car is lowered on bmr handling springs. is it a good idea to go square and be able to rotate tires, or should i stick with the 10 inch from and 11 inch rear stagger?

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[NightmareMoon]

The biggest challenge with 10/11 square is the very limited tire selection in 285/35 and 305/35. Theres a ton of 305/30s but not many 305/35. Going square 11 is actually easier.

Personally I love square 11s, but my street wheels are 285/35 on 10” ET35, which is just a great setup. Fits easy, rotatable, plenty of grip to be honest if you use good quality tires and not cheap nittos.

for the 11 setup, the offset wont work on the front due to inside clearance so you have to 1) run about 1” of spacer (you need an effective offset of ~ET25 so a ET50 with 25mm of spacer works and 2) you need extra camber to tuck the top of the front 11”/305 under the fender.

the best way to solve #2 is to get some decent camber plates. Steeda makes a good affordable camber plate that just works. For #1 Highly recommend getting extended studs and running a 25mm billet slip on spacer. Bolt on spacers are not ideal. OPMustang.com is a good source for spacers and studs and he knows his stuff. ARP has a stuf which works and another which is longer than stock but too short for a 1”/25mm spacer.

Apex Wheels does make mustang fit 11” wheels (forged or flowformed) with both rear offsets AND the correct ET26 for the front if you want to skip the spacers and not be able to rotate. Its an option.

downsides to 11” fronts are tires cost a bit more, you can get tramlining a bit more easily/frequently, and you can rub/wear into one spot on the fender liner over time when full lock.

 

[Horizon5.0]

The biggest challenge with 10/11 square is the very limited tire selection in 285/35 and 305/35. Theres a ton of 305/30s but not many 305/35. Going square 11 is actually easier.

Personally I love square 11s, but my street wheels are 285/35 on 10” ET35, which is just a great setup. Fits easy, rotatable, plenty of grip to be honest if you use good quality tires and not cheap nittos.

for the 11 setup, the offset wont work on the front due to inside clearance so you have to 1) run about 1” of spacer (you need an effective offset of ~ET25 so a ET50 with 25mm of spacer works and 2) you need extra camber to tuck the top of the front 11”/305 under the fender.

the best way to solve #2 is to get some decent camber plates. Steeda makes a good affordable camber plate that just works. For #1 Highly recommend getting extended studs and running a 25mm billet slip on spacer. Bolt on spacers are not ideal. OPMustang.com is a good source for spacers and studs and he knows his stuff. ARP has a stuf which works and another which is longer than stock but too short for a 1”/25mm spacer.

Apex Wheels does make mustang fit 11” wheels (forged or flowformed) with both rear offsets AND the correct ET26 for the front if you want to skip the spacers and not be able to rotate. Its an option.

downsides to 11” fronts are tires cost a bit more, you can get tramlining a bit more easily/frequently, and you can rub/wear into one spot on the fender liner over time when full lock.

i would definitely get a 30 sidewall which keeps it near factory size on a 20 inch wheel. but with a 20x11 ET50, extended studs, 25mm slip on spacer, and camber plates, that would not cause issues with rubbing correct? it would be a 305/30r20. and how much camber would i need? i’m not worried about fender liner contact im worried about strut and fender contact. it would be nice to be able to rotate larger wheels. i could also skip the studs and spacer and just get an ET25 wheel. the wheels i’m ordering are completely custom so i can get any size and offset i desire.

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