My mistake on dates of mid 90's for installation of original Diamondbacks. Installed them about early 2000's. Still tires are 13 or 14 years old and should be replaced for safety, but replacement tire white walls are gleaming at this advanced age.

Friend called me this evening. He said had recently installed TA's on a 70 Challenger that he owns. Was pi$$ed that the rear 255's were staining brown. However said that front 235's were very nice and white.

Quite a coincidence that he called. He was unaware of this thread. Just had called to complain and to ask what he could do to clean up the 255's.

Had a new set of Gooyear Polyglas RWL's on his Hemi Challenger. All these are A-ok.

There are rumors that even though Michelin has taken over ownership of Goodrich, they have licensed TA manufacturing to Coker. Perhaps mystery solved!