(Eli5) Why do Buses & Trucks use 2 skinny wheels put together on each side of the axle? Instead of just using one fat wheel?

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(Eli5) Why do Buses & Trucks use 2 skinny wheels put together on each side of the axle? Instead of just using one fat wheel?

In: Engineering

26 Answers

Anonymous 0 Comments

Tire sidewalls are like the “legs” of a tire. More legs means the system can hold more weight. Also keeping the tires all the same all the way around helps keep things standardized. You can buy and stock all the same size tire instead of having to get multiple sizes. So, in the end it’s about weight carrying ability and economic maintenance.

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