Heavy Duty is an understatement for the versitile TruSpin Skid Steer Rims. The dual Air / Liquid valve stems make the rims reversable and able to be used on most Skid Steer machines.  With a 10mm formed mounting plate, and 4mm rim thickness, these rims are built to handle the toughest terrain. The heavy duty valve guards are designed to make sure that the valves are protected from the elements.