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I don't know of a heavy truck with eight wheels. It would have six, 10, 12 or 14 and 18 if it was a tractor and trailer.

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Q: Why a heavy truck is fitted with eight wheels?
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Why heavy truck is fitted with many wheels?

It's because (a) the more wheels it has, the more weight it can carry, and (b) more wheels means more traction on the road.


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