Extra wide for your wide profile tires and slicks., Allows moving a vehicle in ANY direction, even sideways., Heavy Duty Caster features a larger diameter, easier-rolling wheel, Free up precious floor space in your shop or garage, Compared the to Standard Auto Dolly, the Heavy Duty has larger casters that can hold up to 2500 lbs. per dolly, 5000 lbs. per pair, and 10,000 lbs. for every set of four.