I am wondering as to what loading and/or trailing situations and weights require an E rated tire on a 1/2 ton truck? I have a 2005 Silverado 1500 4x4 with the 5.3L and 4.10 factory gears. I often pull a light 17' Basstracker aluminum boat and 19' fiberglass bass boat and occasionally pull a tandem 3500lb axle livestock trailer loaded down to 5-6000 lbs (including trailer weight) and also sometimes pull a tandem 3500 lb axle utility trailer loaded down to about the same (again including trailer weight). I tow the boats all over the place. I have not yet but plan to start towing the stock trailer a couple hundred miles away a few times a year and also currently tow it once a month or so no less than 75 miles away. The loaded down utility trailer only sees short trips within 50 miles or less from home. I was just wondering if an E rated tire was recommended for all of this? Thanks.