Just purchased a set of BF Goodrich T/A white letters on 09/2025. The white letters turned brown after a couple hundred miles.
Dealer replaced them with a new set at no charge. (DOT number showing manufacture date of 04/2025.)
The white letters on the second set are turning brown after less than 100 miles. (DOT number showing manufacture date of 04/2025.)
I'm in process of contacting BF Goodrich.
My advice, never buy BF Goodrich T/A white letter tires. They have not resolved the Brown letter issue.