Why Don't Airplane Tires Explode on Landing?

An Airbus A320 has a maximum takeoff weight of 78 tons. That number is impressive by itself, but we can find even heavier aircraft. With that in mind, a question becomes inevitable: why don't airplane tires explode when landing? Weight, impact, speed, and energy transfer should reduce them to dust; however, they are designed to withstand hundreds of landings. How do they manage it?

One of the first things to understand is that a commercial airplane tire is not manufactured the same way as a car or truck tire. I have personally witnessed very serious failures in some of them, to the point that they seemed to be victims of a minefield. None of that happens with an airplane tire when it touches the ground. At first glance, they are only 45 inches (1.14 meters) of rubber separating us from the pavement during landing, but if we study it a little closer, everything changes.

A commercial airplane tire uses a combination of proprietary synthetic compounds, steel and aluminum reinforcements, nylon-based fabrics, and aramid fiber. Add to this a much higher recommended pressure, equivalent to six times the pressure of a car tire and twice that of a truck tire. This improves the overall firmness of the tire and gives it more strength to support the aircraft.

But if there is one fact that often surprises the public, it is that they do not use regular air: airplane tires are inflated with nitrogen. Despite what the video indicates, nitrogen is not completely inert; however, it resists pressure changes and high temperatures very well, making it an ideal gas for this application. Another difference worth mentioning is the tread pattern. The channels we see on an airplane tire are not necessarily there to optimize traction, but to evacuate water when taking off and landing on wet surfaces.

The average for a commercial aircraft is 20 tires, with a maximum of 500 landings, and up to seven retreading processes. The tires on the nose gear tend to last less than the rest, and replacement is not a simple task. It takes one hour per wheel, even with the help of two professionals. The working margin does not exceed five centimeters, and they must deflate the tire to reduce the risk of an explosion. Once its useful life is over, the tire is recycled, and even reused in the manufacture of tires for heavy machinery.