Why do transport trucks sometimes have many spare tires hanging from their undercarriage, almost as many tires as those being used? Surely they don’t expect almost all tired being used to break down at once?

Question

Why do transport trucks sometimes have many spare tires hanging from their undercarriage, almost as many tires as those being used? Surely they don’t expect almost all tired being used to break down at once?

In: Engineering

Answer 1

Yes. It can be that the truck is carrying cargo which must reach a destination within a certain amount of time and therefore can’t afford to lose a few hours.