We do indeed offer ST205/15-14 radial tires from 5 different manufacturers in load range B(1430 lbs), C (1760 lbs) and D (2040 lbs).
If you want the best tire available that's manufactured in the USA, I'd recommend the Goodyear Endurance, part # 724864519 this is a D rated radial tire with a 2040 lb capacity per tire or 4080 lb per axle.
For something a bit less expensive, you could go for the Westlake # 274-000012, which is also a radial and has the same weight rating. view full answer...