Tire Storage Racks Display on Casters for Cars & Truck Tires. These racks offer an excellent compromise between strength and lightness. They are equipped with casters which allow moving them quickly and easily. Allow storing 16 tires with an external diameter of up to 31 inches. Packed in a box. Specs: overall size 72"L x 20"W x 75"H; tire quantity 16; max size 31" O.D.