Arrived at our winter c/g in port Richey Fl. yesterday afternoon, and what a HOT one we arrived to, record temps the last two days. After that mis hap with the ubolts and spring center pin snapping, the rest of the trip went uneventful. Thank GOD !! When we would stop for a break I would check the tires for wear and heat and also check the u bolts ( I guess I'm a little parnoid) but I do notice that the tires G614's seem to have a rubber like dust on the tires, is this normal ?? We are travels on mainly pavement and ashfault at 60 plus miles and hour. I guess I'm just a little conserned. If the tires are not balanced would this cause this ?? I purchased the tires as an option from the factory when I ordered the coach, so I'm not sure if they balance them, probably not. Any thought anybody ?? Thanks