The Compac 90538 Wheel Dolly is designed to allow for the safe and easy dismounting/mounting and handling of tires on tractors and other large farm equipment. Having a 3,300-pound weight-bearing capacity, the tool is able to handle wheels from 45 up to 85 inches diameter and up to 41 inches deep. Its double-acting hydraulic system allows for controlled hands-free switching between lifting and lowering, with a top-point wheel connecting rod that keeps the wheel in balance and large rollers that cradle tires with deep treads. It can be disassembled and, with its 6-inch wheels, works on flat terrain outside.