I know our tires no matter the brand or size etc. have alot of numbers on them. Are there any series of numbers that could indicate their mfg.date hence how old perhaps. I have the BFG redlines (coker) on the 70 RR 235-70-15 and they look pretty clean along with a redline spare 225-70-15. All wear looks the same. Wish i could get this tire in a 245-70-15.