You can certainly upgrade your Loadstar tires to a load range E (10 ply) tire. Load range E tires will have a little more capacity and a sturdier construction. Although we do not have a Loadstar with this load range, I recommend the Karrier ST225/75R15 Radial Trailer Tire - Load Range E # AM10303.
These have a maximum load of 2,830 lbs at 80 psi and a speed rating of M for 81 mph. They come with a 5-year limited warranty and a 1-year worry free guarantee. If within the first 12 months... view full answer...