Why Are the Wheels on Semi-Trucks Shaped Differently?

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This article highlights the advantages for the truck and trailer of the numerous wheel shapes used on semi-trucks.

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Most tractor vehicles are attached to a fifth wheel trailer. This makes it possible to attach fifth wheel trailers to the vehicle, like an RV trailer.

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The fifth wheel evenly divides the trailer's weight between the truck's front axles.

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A truck being moved with a trailer attached safely requires this weight distribution.

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The fifth wheel's form also aids in evenly distributing the truck's weight fore and aft, improving control and manoeuvrability.

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Additionally, it enables modification between the fore and aft axles, allowing for even weight distribution.

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Most truck wheels are formed polished aluminium wheels because semi-trucks pull trailers along roadways.

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This is because maintaining semi-trucks while travelling great distances is practical. Great straight roads are a common feature of Australian highways,

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enabling for the transit of incredibly long distances. Additionally, single hub wheel designs rather than two hubs,

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as seen on passenger cars, are employed for semi-trucks due to space restrictions.

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