Attention: TDR Forum Junkies Anyone else having mysterious looking valve stems after 20k-ish miles ? My buddy has an 04. 5 quad cab dually and four of the valve stems look like they are almost weather checking and bulging at the rim. He doesn't overload the truck, keeps his tire pressures in check, and only tows an enclosed car trailer that loaded is around 8-10k ???? Very strange ... . Now he has me paranoid because I've got the same truck as him... ..... 
