What does 4PR tire mean?

[Ellen]

4PR stands for 4P (plies) R (reinforcement), which means the tire is constructed with 4 layers of reinforcement cords. Generally, the more plies a tire has, the stronger its load-bearing capacity and the thicker the tire. Typically, 4PR tires are used for front wheels, while 6PR tires are used for rear wheels. Tires are circular elastic rubber products mounted on various vehicles or machinery to roll on the ground. They are usually installed on metal rims, supporting the vehicle body, cushioning external impacts, ensuring contact with the road surface, and maintaining driving performance. Tires often operate under complex and demanding conditions, enduring various deformations, loads, forces, and extreme temperatures during use. Therefore, they must possess high load-bearing capacity, traction, and shock absorption. Additionally, they require high wear resistance, flexibility, and low rolling resistance with minimal heat generation. The strength of tubeless tires is indicated by the number of plies (PR). The higher the ply count, the greater the load capacity of the tire. However, more plies are not always better, as increasing the ply count enhances durability but reduces comfort.