Goodyear Wrangler SR-A. They are a crap tire like most new vehicles come with, they are also not the correct tire for the truck. The problem lies in static weight, this truck ('13 KR 4x4) has a empty weight of 6,064 lbs, throw in some misc gear and a driver and you are bumping 6,500 lbs. More than most F-150s except a crew cab raptor. The F-150s come with load range "C" tires in most cases, the expedition comes with a P metric, great for ride awful for wear and load handling. I'm swapping the Goodyears out with some Michelin's as soon as I finish the whipple swap. I've had my truck for 7 months now and have just shy of 5,000 miles on the goodyears and you can see wear already and I have been extremely unimpressed on right of ways with these tires.