OTC 55-Ton Aluminum Ram with Half Coupler 55-Ton Aluminum Rams Get the strength of a steel ram but about half the weight. Easily carry these single-acting spring-return rams around the garage shop or into the field for on-the-vehicle repairs. They are ideal for truck axle correction trailer frame straightening general vehicle maintenance and heavy-duty lifting. 6-1/8 inch stroke, collapsed height 10-3/4 inch , and extended height 16-7/8 inch.