Why do some trucks have a spare set of wheels hanging? Wouldn’t it better to just have all the wheels on the road?
In: 159
Another reason is that it improvs turning circle. For instance timber trucks with trailers can then turn unloaded on a small patch on a forest road. After turning, they lower the wheels and start loading. The wheels needs to be down to not exceed max axle loads.
Watch the last axle of the trailer
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