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So I was on a work trip and it got really cold. I had the original SS ZP still on and I was due replacement. Local shop had AS4 ZP in stock so I replaced them. When I looked at the old ones I found this on both my front tires. I checked them prior to the road trip and was no issue. There was no indication this was happening. I will have my home dealer check the alignment when I get home but has anyone seen this happen. Both on the front inner side
I’m thinking it’s time to find a local dealer to do an alignment. If you wait till you get home you way see your brand new tires look exactly the same as the old ones you replaced. Spend an hr or two and fix it.
^^^
I suspect that your tires were bad before you noticed them, that's so far to the edge that a normal looksee might not spot it.
Either way, lesjhawk22 said it right- get it aligned ASAP.
Sometimes the problem is too much negative camber, more often it's toe-out that kills tires in a hurry.
Thats usual wear and tear due to the factory alignment. Happens on rears sooner than the fronts. Somewhere on the site someone posted street alignment settings. Was planning on changing to them when we switched over to AS tires. But had to wait 3 months for new wheels to come in and when I took them off recently to put on the new wheels they were wearing evenly so I decided not to change the factory alignment.
My C7Z06, MPSS looked exactly like yours with only 8K on them. I've had them on other sport cars, although they look great and perform well, especially for summer driving, they just don't last long. Below is a recommended alignment spec sheet that I found here on the forum. I took this to a local alignment shop, and the tech used it as reference. Only exception was that he slightly adjusted toe-in to keep the inner sidewall from wearing. I used the Street/Occasional Track setting spec at the top of the chart. I also purchased new tires prior to getting the alignment and went with the MPS AS3+ all season tires, great tire for summer driving on both wet or dry pavement and cost less if you can find them, however, they may be hard to locate because they were replaced by the MPS AS4+ all season tires. Good luck, hope this helps!
I run the street/ occasional track alignment shown above on my '16 Z51 M7. Front MPSS tires lasted 35K miles and would have gone much further, but I didn't keep after the alignment and left frt tire corded the inside edge. Found alignment out to -1.7 on the left frt (pothole?) and replaced both frt tires at that point.
Rears lasted 56K miles.
Exact opposite experience with my prior 565 hp supercharged Mustang Cobra. replaced rear tires twice before the fronts wore out. That car made me do bad things.
I give up, how cold was "really cold?" If the relevant caution in the Manual is ignored the things will crack and fall apart if continued to be driven on when damaged.
I am with eboggs. Negative camber gives more cornering power but it wears out the tires just like the OPs were. I used to be a Lexus tech and one model did similar but not quite so bad. It was the Lexus version of a Camry. Why Lexus set the front at -.7 camber I never understood. Those customers don't care about cornering but they sure get pi$$ed off when the tire has 4-5/32 tread except to that inner tread row that they can't see and that is corded.
Just had to replace tires in my grand sport due to the right one doing that on the inside. Car never pulled or felt wrong. Had I not dropped a nut on garage floor I would not have seen this. Didn't notice it a week earlier cleaning the rims. Installed new tires and 4 wheel alignment. Will now check wear every wash.
On our 2017 Z51, I have the front and rear camber set at about -.7
That gives good cornering without wearing the tires too quickly-
If I've been doing a lot of highway cruising with little cornering, the inboard tread will wear somewhat more than the outboard, but nothing near as bad as OP's pic.
If I do a lot of canyon carving and autocross, the wear is about even across the tread.
I have the toe set at 0 to .1 positive, that's very slight toe in. Toe out eats the inboard edges of the tires in a hurry, possibly what happened to OP. It also makes the steering twitchy, good for overcaffinated autocrossers but not for the rest of us.
Tire issue
