How do truck tires handle heavy cargoes without them popping because of the weight?

Question

How do truck tires handle heavy cargoes without them popping because of the weight?

In: 54

Answer 1

Tire guy here… truck tires have more layers of rubber/Kevlar, steel belts etc.. also known as plys. These plys are what add structure and strength, allowing a higher air pressure (which increases load capacity) normal passenger tires are 4 ply heavy pickups are typically 10 ply. Semi truck, bus, heavy equipment etc are 14ply or more. Passenger tires max pressure is typically 40-50 psi. Heavy pickups are around 85psi and heavy trucks, busses, equipment are well over 100psi.

Tldr, the heavier the load requirements the more air pressure you need, resulting in the need for more plys.

Edit to add.. obviously the more tires you have, the more capacity you have as well.