Is this normal tire wear?

[5OSONIC]

These are the rear tires of my 2016 Mustang Gt. Seems like the center tread is wearing out a lot faster than the inner and outter edges. Is this normal? If not, what could be causing this? I have steeda progressive springs, and the car was aligned to factory specs. The car was aligned 2 years, roughly 10K ish miles ago. Rear tires are usually at 32 PSI

Sponsored

 

[BmacIL]

In short, the factory specs suck, and have such a wide margin for "green" that you can end up with a pretty crappy alignment still. If you have your alignment sheet, post it up.

For a street (little to no track use) car, one should look for the following alignment:

Front
Camber: -1.5 +/- 0.1 deg
Toe: 0.00-0.05 deg per side, steer ahead 0.00

Rear
Camber: -1.2 +/- 0.1 deg
Toe: 0.10-0.12 deg per side, thrust angle 0.00

 

[5OSONIC]

In short, the factory specs suck, and have such a wide margin for "green" that you can end up with a pretty crappy alignment still. If you have your alignment sheet, post it up.

For a street (little to no track use) car, one should look for the following alignment:

Front
Camber: -1.5 +/- 0.1 deg
Toe: 0.00-0.05 deg per side, steer ahead 0.00

Rear
Camber: -1.2 +/- 0.1 deg
Toe: 0.10-0.12 deg per side, thrust angle 0.00

Updated my original post with the sheet. Seems like the actual numbers are pretty good?

 

[Dana Pants]

Looks like tire pressure is too high for how you drive. I run 28 psi in my rear snow tires to avoid the issue you show.

 

[BmacIL]

Updated my original post with the sheet. Seems like the actual numbers are pretty good?

Too much rear camber and probably excess rear tire pressure as stated above. I've typically run 29-30 cold most often.

 

[NightmareMoon]

If you cord the middle of the tire like this then its just a little too much pressure.

you were about to cord the inside edges too, so I would say you did pretty well getting the most out of that set.

 

[brl0301]

another potential issue that ive seen wear out centers is running too wide of a tire for a given rim size. Squeezing the wider tire onto the narrow rim causes it to bow up in the center and wear faster that the outsides. What size tires/rim are you running?

 

[5OSONIC]

Too much rear camber and probably excess rear tire pressure as stated above. I've typically run 29-30 cold most often.

Ah, okay. I'll request -1.2 deg rear camber next time the car gets aligned.. Already lowered the pressure. Thanks!

another potential issue that ive seen wear out centers is running too wide of a tire for a given rim size. Squeezing the wider tire onto the narrow rim causes it to bow up in the center and wear faster that the outsides. What size tires/rim are you running?

11" wide wheels with 305 Michelin Pilot SS

Sponsored