Carlisle A.C.T. HD is a 6-ply radial tire designed to absorb trail hazards and vibrations. The A.C.T. HD boasts deeper tread, higher pressure, and load capacities than its predecessor. Its improved sidewalls are stiffer than original A.C.T. which makes this tire ideal for tackling the tough terrains. Carlisle A.C.T. HD Tires are proudly made in the USA and sold here at a very competitive price.