Why do some trailers on lorries not use all their wheels? Like some are raised up, why not use them all?
In: 15
Its all about weight distribution. The heavier the load, the more wheels on the ground are needed to distribute the weight evenly among the tires. When the load it light, the unneeded wheels are lifted to increase fuel economy. As the loads get heavier and and exceed the load rating on the tires, more wheels are lowered to accommodate the load correctly.
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