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Can someone please explain to me why some heavy duty trucks, such as dump trucks or garbage trucks, have those tires that don't touch the ground? It annoys me when I see it. I realize that the extra axels are for when the trucks are a carrying heavier loads then normal, but why are the tires just hang there in the air instead on on the ground? Is it to save wear and tear on the tires?
 

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Can someone please explain to me why some heavy duty trucks, such as dump trucks or garbage trucks, have those tires that don't touch the ground? It annoys me when I see it. I realize that the extra axels are for when the trucks are a carrying heavier loads then normal, but why are the tires just hang there in the air instead on on the ground? Is it to save wear and tear on the tires?
You are correct, sir. They suck the unneeded tires up off of the ground when not needed because of a light load. This saves unnecessary wear and tear on these tires, because they do scrub as the truck makes turns. :cool:
 
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