Just put Goodyear Endurance ST205/75T15D tires on it. They are rated to 2150 each or 8,600 pounds for all four, on a trailer with a 7,600 GVWR. 7,600 minus around 800 lbs hitch weight and you will be fine. You will have lots of reserve capacity. If you ran your OEM tires for 7 years you have...