Uneven Rear Tire Wear?

[ldusseau]

Bought a used 2018 Hichroma Red Stinger GT2 "unicorn" with less than 10K miles on it about a month ago and I absolutely love it! However I do have a question that came from the independent PPI, they noted the right rear tire is worn more than the left. I noticed a very slight vibration from the rear on the test drive (pre PPI) that I thought could be from balancing, but now I'm wondering why one tire would be worn more than the other? The PPI shop said there wasn't any cupping or anything else that would lead them to an alignment/suspension issue, just one tire worn more than the other. My car also had a "minor collision" in the Carfax report (<$900 CDN), I could tell the rear fascia had been replaced because the paint gloss was not quite the same in bright sunlight as the rest of the car (I'm an automotive engineer with sixteen years experience in exterior trim/fascias so I notice these things right away) and the PPI shop agreed. But what we couldn't figure out is if one rear tire was replaced as a result of the little mishap or if there is something else going on. The car doesn't have any issues with vibration, I had it over 110mph yesterday and it was smooth as glass. There was a little vibration while decelerating through the 80s but that was it. The shop just recommended I replace both rear tires and just keep an eye on it; I'm fine with that but wondered if anyone else had this experience?

 

[BadTrainDriver]

AWD? I'd be careful about replacing a single or even two tires.

 

[nhcowboy28]

Old nascar reverse oval car.

Right rear wear to be expected.

 

[ldusseau]

AWD? I'd be careful about replacing a single or even two tires.

Yes, AWD. The PPI shop does a lot of work on expensive imports, so if they say only replace the rears, I'm ok with that. They said the front tires were fine. Besides I have my eyes on a new rear sway bar already, so the less money I spend on 4 new tires, the better.

 

[RogueIV]

Bought a used 2018 Hichroma Red Stinger GT2 "unicorn" with less than 10K miles on it about a month ago and I absolutely love it! However I do have a question that came from the independent PPI, they noted the right rear tire is worn more than the left. I noticed a very slight vibration from the rear on the test drive (pre PPI) that I thought could be from balancing, but now I'm wondering why one tire would be worn more than the other? The PPI shop said there wasn't any cupping or anything else that would lead them to an alignment/suspension issue, just one tire worn more than the other. My car also had a "minor collision" in the Carfax report (<$900 CDN), I could tell the rear fascia had been replaced because the paint gloss was not quite the same in bright sunlight as the rest of the car (I'm an automotive engineer with sixteen years experience in exterior trim/fascias so I notice these things right away) and the PPI shop agreed. But what we couldn't figure out is if one rear tire was replaced as a result of the little mishap or if there is something else going on. The car doesn't have any issues with vibration, I had it over 110mph yesterday and it was smooth as glass. There was a little vibration while decelerating through the 80s but that was it. The shop just recommended I replace both rear tires and just keep an eye on it; I'm fine with that but wondered if anyone else had this experience?

someone likely got a flat and replaced only one tire at the time. Just get 2 new rears, our cars are fairly flexible with slight front to rear differences in diameter. Try to keep them the same brand and model though or handling can suffer.

 

[RedCal]

Yes, AWD. The PPI shop does a lot of work on expensive imports, so if they say only replace the rears, I'm ok with that. They said the front tires were fine. Besides I have my eyes on a new rear sway bar already, so the less money I spend on 4 new tires, the better.

Save up a little more and get the front as well... it's well worth it

 

[MerlintheMad]

I've replaced my rear tires twice and in the not too distant future will replace my front tires for the second time: no issues at all doing this with AWD. The last pair of rears, the RR wore to the wear bars first: this is the price paid for having true directional wheels, where you can't even swap side to side unless you want to look silly with your spokes sawing at the air instead of cleanly cutting through it. My wheel and tire guys say that the difference in wear at the end is maybe a thousand miles is all; not enough to sweat over.

 

[ldusseau]

I've replaced my rear tires twice and in the not too distant future will replace my front tires for the second time: no issues at all doing this with AWD. The last pair of rears, the RR wore to the wear bars first: this is the price paid for having true directional wheels, where you can't even swap side to side unless you want to look silly with your spokes sawing at the air instead of cleanly cutting through it. My wheel and tire guys say that the difference in wear at the end is maybe a thousand miles is all; not enough to sweat over.

Thanks, that's what we thought (someone replaced one rear tire) but it was just curious. Sometimes my engineering mind has a hard time unless there's a really concrete answer to an issue.

 

[WRXtoStingerGT]

the rear tires on my GT RWD wore rapidly and a bit unevenly as well

 

[JSolo]

Maybe I should of insisted on an alignment check as part of the car buying agreement....