Wow, a sample size of "ONE" with an unknown wheel/tire combination (BUT NOT AN OEM combination), and there are literally tens of thousands of Plaids since 2021 with 19" wheels with next to zero issues.
So "absolutely positively not a Michelin issue" is a pretty huge jump, no?
Not much scientific method there folks . . . .
It remains very likely a "Michelin issue" since it's so prevalent among the 21" Michelin fleet, and so far beyond rare in the 19" Pirelli fleet.
For those with the 21" Michelins, be SURE to file a formal complaint via their website and you'll get a new set of tires from them, AND create another data point to help get these janky tires off the road, hopefully BEFORE someone gets hurt.
We want you to be 100% satisfied with your Michelin tires. If you have questions, then view our Michelin Warranty Information and the Michelin Promise Plan.
www.michelinman.com