Switching to Staggered Setup

[blind*guardian]

A 19x10 wheel is used a lot here and there are A LOT of options. No adjustments necessary and you will not have any rubbing/scraping. You'll need a 35mm - 30mm offset, otherwise may need a small spacer. I tried 275/40R19 tires on a 10" wheel with 40mm offset and it was very very close to rubbing on the strut up front, so I think a 35mm offset is perfect. LMR has many options specifically for Mustangs with the right offsets. I'm sure there are other brands and options as well.

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[Norm Peterson]

S550 Mustang - Ford - Shop By Vehicle (apexraceparts.com)


Norm

 

[Bikeman315]

I’m currently running the stock size 255/40/19 on all four wheels and they’re Pirelli Zero Neros. The tires I tried putting on the back were the continental DWS ExtremeContacts and leaving the Pirellis on the front.

OK, maybe I'm missing something here but this is the #1 problem. Two totally different tires on front and back. No wonder the car isn't handling properly.

Also no one has mentioned that just increasing the rear tire size doesn't give you a true "staggered" setup. The width rear wheels also need to be increased to handle the larger tire.

As already mentioned OP has 8.5" standard wheels. He added 275 in the back which is too much for the wheel.

So wrong tires and wrong wheels. Can't image why there would be a handling issue.

OP, get those 275's off until you are willing to get bigger wheels out back and four matching tires.

 

[SEAICE]

A 275 on an 8.5 in wheel is a little wide, but fine. I tend to run wider tires than recommended and have done so with no problems in 44 years of driving. That said, both the Contis and Pirellis are not "directional", but they are "asymetrical" meaning you have to have the correct side facing out. They are marked "Outside" That's important. If that's not your problem, what you're describing can definitely be a tire mis-match issue... I could see that with the PZeros and Extreme Contacts. If the Contis are in good shape, I'd replace the Pirellis.

 

[Norm Peterson]

A 275 on an 8.5 in wheel is a little wide, but fine. I tend to run wider tires than recommended and have done so with no problems in 44 years of driving.

Keep in mind that OP was referring to high speed cornering.


Norm

 

[NightmareMoon]

Two problems - 1) badly missmatched tire types with narrow low grip all seasons on the front. The traction control is goong to be unhappy with the front tires breaking loose, being hard all seasons. Fix by replacing the front tires with DWS continentals so they match.

2) soft sidewalled rear tires pinched on narrow wheels. These continentals really aren’t the right tire to try to get away with oversized tires for the wheel width. Some tires may work, but contis are soft in the sidewall leading to grippy but squirmy handling. Better to get a 9.5 or 10” wide wheel back there.

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