Daily Driver Square Tire Setup

[Cali5.0]

Hello, I am switching over to a square tire setup from a staggered setup. My car is a 2020 Mustang Gt PP1 (also has magneride). I’m looking at Costco and they offer the:
285/30ZR19/XL or 285/30ZR19
285/40ZR19/XL or 285/40ZR19

Can anyone weigh in on what they recommend for a daily driver with occasional spurts of speeding?

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[MrMike]

The standard easy button is 285/35R19. Tons of tires in this size. I wouldn't go up or down in terms of profile.

 

[WItoTX]

I personally wouldn't go square because you still can't rotate tires. Unless you are getting new wheels too.

 

[Racin4ds]

I personally wouldn't go square because you still can't rotate tires. Unless you are getting new wheels too.

Yep, unless you're changing wheels, the rears are wider than the fronts... ;)

 

[ChitownStang]

I'll be switching the 285/35R19 square on my 19x9.5" RTR wheels
Going to Continental DW sports... I like them better than PS4S
Also they are non-directional for rotation

 

[MrMike]

I guess I made the assumption that OP was considering new wheels if he was moving to a square 285 setup. Whoops.

 

[Farkel]

As others have said, there's no point to going square unless you also change the wheels. For me, 19x10 wheels (+35 offset) with 275/40 tires is ideal. My car is also PP1 w/ magneride, and the 275/40 is the stock rear tire size. 285/35 has a smaller diameter, so unless you're also lowering the car you'll have a larger gap between the tire and wheel opening, and the 40 profile also gives you a more comfortable ride than a 30 or 35. FWIW - I like spirited driving on mountain and canyon roads, and this wheel & tire combo works very well. Of course, the right (or wrong) tires are very important if handling is a priority.

 

[sms2022]

I have 295/35/19 super sports on the front of my pp1 with 10” rims and it’s perfect. The supersports run a little narrower than other tires through, probably equivalent to a 290 section tire really.

 

[S550 HPP]

I have 275/40/19 on 9.5 inch wheels.

 

[MAGS1]

Agree with others, if you’re not switching to a square wheel setup, it doesn’t matter that you switch to square tires as the wheels will prohibit you from doing a full rotation.

285/35r19 or even 295/35r19 is a good setup for a 19x10 square wheel setup. Can also do 275/40r19 which is the stock size for the rears on a PP1.

285/40r19 is not a common size (there are some options but not a ton) whereas the 285/35, 295/35 and 275/40 are pretty common and you’ll have a good amount of manufacturers to choose from.

 

[barron64]

Lots of selection with 275/40's and 285/35's with similar pricing. The 295/35's and 305/35's have less selection and are quite a bit more pricy. The 285/35's are a good bit shorter than the 275/40's though so you will see more fender gap.
I am currently running a square set of 285/35's on SVE 19x10 square set up. Going back to 275's on next set though.

 

[ChitownStang]

I think the diameter difference between the 285/35 26.9 “and 275/40 27.7”
Split that difference in half and that’s the additional finder gap
Wouldn’t the additional width moving the tire out a little offset that fender gap:
Here’s my current setup with 275/40 19” DWS’s squared.

 

[Cali5.0]

Thank you all for this information and wow. Never knew it was more deep than that. Honestly thought I was able to do a square setup with the original wheels the 2020 mustang Gt premium pp1 came with.

 

[GrabberBargeCaptain]

Time to look at new wheels. Staggered wheels preventing you from rotating 400 dollar tires is madness in my eyes.

 

[luc]

I personally wouldn't go square because you still can't rotate tires. Unless you are getting new wheels too.

Correct. You need about 35 offset to rotate

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