I have a 2011 F250 club cab SWB pickup. I noticed today while

airing the tires that both my rear tires had a lot of wear on the

inside treads. Both are worn in the same manner. The middle

and outside of the tires look great as well as the front tires

The truck has 17,000 miles on it and about 9000 of that is towing a fifth wheel (RV). I am towing around 13000 lbs. I make sure my tires have
80 lbs when towing. The tires have not be rotated.

Any ideas?

Thanks in advance

 

Rotate your tires every 6000 miles and lower the pressure some