I confess that I dont know much about tires but when I was a kid in the late 60's early 70's, tires came wrapped in paper, or colorful foil. That was to protect them from something.
Also, New tires were/ are coated with something blue. I'm pretty sure that was to protect them (from the air?) while in storage.
My Jeeps sit outside. Both have brown sidewalls. The whole sidewall on both jeeps.
My 4wd pickup also sits outside; with BFG RWL "All Terrain TA's" on there... Not brown at all.
I've had Cooper Cobras' on the GTO for a year now. One tire showed a small brown spot within the first two months. I've been spraying them w/ armor all, the original one, not the tire stuff. It claims to have UV protection. I havnt noticed any new discoloring, but I'm not leaving the car sit in the sun as much these days. I used to let the car sit outside all day. My last set of tires, Mastercraft, turned brown too; the whole tire, not just the letters.
Quick story: I installed a new A/C unit and line set in my home last summer.
The Armorflex insulation on the line set in my basement is like new, soft and nice. The part that goes outside is dried up, porus, and splitting already. Looks like a twenty year old line set. The rubber is cheap or is it the sun? or both?
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