Internal combustion IC forklift trucks come as cushion tire or pneumatic tire trucks.
The IC trucks come in a broad range of fuel. Liquid gas is popular because it burns cleanly which is desirable for indoor use. It is relatively easy to store. Dual fuel, LPG/ gasoline and diesel engines are common mainly for outdoor use
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The IC cushion forklift is the most common. The cushion tire is best to run on smooth, indoor surfaces. The tires are small, giving the truck a low center of gravity which is useful in fast cornering. The capacity of cushion tire forklifts goes up to 10,000 lbs with most manufacturers.
The IC pneumatic forklift has tires that give a softer ride. IC pneumatic forklifts have better traction than cushion tires. They also have higher ground clearance and are better on uneven ground, such as outdoors. With loads over 10,000 pounds, the pneumatic tires are preferred.
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