There are those that baby new cars even if it is a Wranlger and then there are those who just can't wait to go off road with their new JL like Dick's 4x4 Garage. He wasted no time after putting on a set of 37's from a K10 Crawler to hit the trails and it pretty handled everything like a champ. The tires definitely makes a difference, so an aftermarket set may be a wise investment.