I bought Bf Goodrich tires for my classic 1969 Mustang back in late 2015, 2 255 - 60 - 15 for a the rear and 2, 215 - 65 - 15 on the front with date codes 16 15. They have less than 100 miles on them the car is always in a heated and air condition grarge the lettering turned brown in less than a year. I took it back to were I bought them and they said to try tire white product on them and see what happens. I tried it and they didn't change they said l could try to sand them or paint them that was not a opposition for me. I've tried several things nothing seems to work I would to get the issue resolved this year. I've been a fan of Goodrich tires for a long time I have two other vehicles with Goodrich tires one is a truck with 33 - 12.50 - 15s Goodrich all terrain the lettering is still bright white the other vehicle are just plan. I like the ride and handle just dissatisfied with the lettering on the mustang.