I have a 2009 highwall Fleetwood tent trailer. The sticker on the camper says 50psi for the tires. The tires say max 50psi. I religously keep the tires at 50psi. The tread is wearing a lot more on the inside and outside of the tires. The middle of the tire has a lot more tread than the sides. Both the right and left tire are have the same uneven wear pattern. It's odd because this kind of wear is usually due to under inflation but I am keeping them at 50psi as instructed. Very odd. I am towing with a 2010 Ram 1500. any ideas?