ply rating

ply rating

A rating used for aircraft tires to indicate their relative strength. The ply rating does not indicate the actual number of plies but rather the equivalent number of plies of cotton fabric needed to produce the same strength as the tire plies.
References in periodicals archive ?
Another problem is a tire being the wrong ply rating (too low or too high ply rating), which contributes to too little or too much cushioning on landing, as well as during taxiing.
Trident has two basic types of ATV tires, bias, and radial construction, Due to the heavy duty construction and 4 ply rating..
You might also come across the term 'ply rating' or PR on a tyre wall.
Another characteristic of aircraft tires is their ply rating. A tire's "ply rating" molded into its sidewall helps identify its strength, and is an admittedly dated method of rating the tire's load capacity (automotive tires use a weight-based load-rating system).