Michelin PS4S issue

[XjonesX]

Would love to see the alignment results, as it seems we have a small epidemic. I wonder if the tires are bad...

well...., there does seem to be a common denominator it looks like. I mean..., I'd lean towards the tires, because I'm seeing a lot of the same inner wear issue. However, why does it seem to be located in the same area of almost all these tire? Does that allude to a suspension issue with the BW? Mine was the front left tire. Never pulled when going up the road, as a matter of fact, I could take my hands off the wheel, and it would track true straight ahead.
Once I get my alignment done, I will report back on what they found.
Presently my BW has been sitting at the dealer for a week and a half because of brakes issues.

A) It needed new brakes after 21,000 miles, and apparently there is a several week backlog at GM dealers for brembo OEM brake pads.
B) I wound up purchasing KNS pads so I could get my car back, however when I received them yesterday, while the correct brake pads...., they didn't have the cut out notch for the brake sensor.
Their web site said these were a correct fit for my BW, but didn't say anything about the sensor notch.

I digress...., My next set of summer tires will be something different than the Pilots. I was never really overthrawled about them anyhow.
They just didn't seem to have enough stick to the road ability, and a lot of times were just slick on the road...., ice skates.
However, tire rack seems to list them as one of their better tires on their site.
Does anyone know what other vehicle (manufacture) uses pilots as their OEM tires? Do these folks have toe in issues that cause this kind of wear, or is it actually maybe the tire quality itself?

Also, back to the brake issue...., Here are a couple of photos showing the OEM, and KNS brake pad difference without the sensor hole.

 

[rdollie]

Aha, just stumbled across a video showing this tire issue with Taycans, Teslas, etc. It's due to excess negative camber(start around 4:15):

The reason I haven't seen this on the replacement tires is probably because I followed up the install with an alignment.

 

[conipc]

It would seem the issue may be a combination of excess toe AND excess negative camber. Those 2 together might encourage that inner tire wear. I I think the toe should be around .1 and the camber 1.00 for lower end of the range...

 

[poor-sha]

The toe was out on the front drivers side which is the photo i attached, however the passenger side front tire was almost as bad.

I don’t think that .28 deg vs .19 deg total toe is going materially affe t tire wear. The left to right difference is just how straight the steering wheel is.

 

[conipc]

True, but I think in combination with the camber at the high end of the correct range, we may see a cause. I've asked the Service Manager and my salesman to move this epidemic up the line with Cadillac and tire folks. Sent them a link to this thread. The tire folks should know if there are other cars seeing this. I noted the Porsche mechanic info in this thread to the effect the camber is too negative in the Taycan and some Teslas. Would be interesting to see if the higher-ups do some investigating..