The CLARK C40/45/50s/55s series are heavy-duty internal combustion (IC) pneumatic-tyre lift trucks designed for load capacities in the 4,000 to 5,500 kg range (i.e. about 8,000 to 11,000 lbs). These forklifts are built for demanding environments—outdoor yards, building material handling, ports, general warehousing—where robustness, good ground clearance, and reliable power are essential. They are available with LPG or diesel engines, giving flexibility depending on fuel availability and emission / operating cost priorities.