Hercules was originally a subsidiary of Cooper Tire and Rubber company. They are currently a wholly owned subsidiary of American Tire Distributors, Inc.. American Tire Distributors is one of the largest independent suppliers of tires in the North American market specializing in replacement tires. They are American made and I have always had good results from them. As with any commercial tire, make sure the load range is adequate for your application. Coach manufacturers often choose the lowest load range (cheapest) that will meet the requirements. So, verify the actual weight of your coach and it's GVW when choosing tires and insure that the load range meets or exceeds those weights.
Richard