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

Question

(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

Answer 1

Please note that there are many trucks that do use single fat tires rather than skinny tandem tires. There is a lot of science in the world of pavement-tire interaction and the “fat” tires are increasingly being used these days.