Our powerful, most capable, full-size, three-passenger diesel Mule Side x Side ever. The 2017 Mule PRO-DX features the largest steel cargo bed in its class, big enough to close the tailgate on a full-size wooden pallet (40 x 48 inches) with up to a 1,000-pound cargo bed capacity (600 lb. maximum cargo bed capacity for California models) for secure transport.