The Rock N Roller R12 All Terrain Truck has a capacity of 500 pounds and easily handles photo or video equipment large PAs keyboards and lighting systems. The rugged steel frame telescopes from 34 inches to 52 inches long with 32-inch folding sides t o stack loads high. Pneumatic wheels and casters offer excellent shock absorption protecting delicate equipment on all terrain. This convertible cart ingeniously changes shape and length for varying load sizes and folds small for storage. Specificall y designed to meet the requirements of car and air travel Rock N Roller Multi-carts are the best-selling cart in the music industry.Special Features:2-wheel hand truck formation has a long nose and stair climbers to maneuver bulky equipment over stai rs and curbs.32-inch foldable sides rotate and lock into place easily.8- x 2.5-inch patent-pending pneumatic swivel casters allow instant removal for travel and easy field service. Perforated front axel reduces weight