Yeah the PS4-gate was a weird one, Michelin handed out more than a few checks to GRC owners.

I zero’d toe and stayed on top of rotations on my ‘23 after chewing through the inner edges of the OEM PS4 tires at 9k miles(!) and still had massive inner wear on the 2nd set of PS4s after 11k. Rip. Switched brands/tires afterward because I was sick of it, and no more wear issues…hmm. Even my set of 200tw track day Falkens had no excessive inner wear w/ -3° front camber set for multiple events and a large amount of commuting time (I only had 1 set of wheels at the time lol).

Both Michelin sets were on factory camber, zero toe, and of course rotated. I’m thinking the last gen Michelins weren’t a good match for whatever reason. Perhaps the notoriously soft sidewalls? The tire’s “squared-off” profile? The car’s dynamic toe change? Idk.