NHTSA Complaint #11476312 — 2021 FREIGHTLINER CASCADIA

TIRE SIZE: 275/80 R22.5 MICHELIN ENERGY LINE Z Component that failed is passenger side steer front tire. The outside edge decoupling groove/sidewall failed. Risks include potential tire blow resulting in loss of vehicle control. This failure could cause an accident putting others safety at risk. Both Freightliner Corp. and Michelin Tire Co. are aware of this failure. No one has inspected the tire. I have the tire in my possession. There are/were no warning, messages or symptoms of this problem prior to. Michelin Tire Co. sent us 2 new tires and requested we remove the air fairing to see if this could resolve the problem. At the time we proceeded with this request the truck had 315,805 miles on it. On 6-20-22 Michelin Tire Co. supplied Freightliner Corp. with a tech bulletin regarding the decoupling groove failure. At 455,485 miles this tire was showing signs of decoupling failure. This failure appeared to be within the guide lines of the tech bulletin. At 465,523 miles the tire showed excessive decoupling groove failure in multiple spots. Mileage on tire at the time of failure was 149,718 miles.