This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.
So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.
Cooper Discoverer 275-55r20 had a stranger point out a very large bulge on the inner sidewall of my passenger side rear tire. This is the 3rd tire from a set of 4 that has developed the same issue within 3 months. Cooper Tires is not wanting to help resolve this issue. They want the tire dissected and returned before doing anything.
On 05/19/2023 driver's side front wheel removed for brake replacement. Noticed large bulge on inner sidewall of Cooper Discoverer 275-55r20 tire. This was the 2nd tire of a set of 4 that has developed the same issue. Now a third has a bulge. I will submit a 3rd report for it.
Cooper Discoverer 275-55r20 developed bulge in inner sidewall. I was unaware of issue until a stranger pointed it out. That was on 03/08/2023. Since then, 2 more tires have developed the same issue!! The last 2 have been looked at by tire installation professionals and determined to be manufacturer defects.
- Vincennes, IN, USA
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- Vincennes, IN, USA