Shinko SR241 Trials Tire (3.00-21) A versatile performer with a tough nylon carcass and high dimpled knobs that work well in a variety of terrain. A narrow knobby configuration means less of an environmental footprint while on the trail.Tough nylon carcass and high dimpled knobs work well in a variety of terrain.4-ply rated, DOT approved, tube type.All sizes will work for front or rear fitment.Tire