Why do some truck has double axles and some don't? Why some are high and some are low?
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Explanation:
1) The technical term is “dual rear wheel”, called dually or DRW for short, and it all comes down to increase safety and stability when towing. With two wheels instead of one, a truck can distribute the weight of a payload more evenly and have improved stability when towing loads like horse trailers or large campers.
2) The high deck trucks have their trailer bed situated high above the trailer wheels, which provides a raised uniform platform for the cargo to carry. ... On the other hand the low deck trucks are those that have two level drops in their deck heights.
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