What does TBR mean?

[Maeve]

TBR refers to radial truck tires. Radial tires (radial-tire) are a type of tire structure, different from bias tires, arched tires, and adjustable pressure tires. The international code for radial tires is "R", commonly known as "steel wire tires". In 1946, the French Michelin Tire Company trial-produced the world's first radial tire. Based on the materials used, radial tires can be divided into three types: all-steel radial tires, semi-steel radial tires, and all-fiber radial tires. All-steel radial tires use steel cord for both the carcass and the belt layer, generally used for heavy-duty and engineering machinery vehicles. Semi-steel radial tires use rayon or other fibers for the carcass, while the belt layer uses steel cord. This type of radial tire is typically used for cars or light trucks, such as buses. All-fiber radial tires use rayon or other fiber cords for both the carcass and the belt layer, with the belt layer cords using low-elongation cords. This type of radial tire is generally used for low-speed cars or tractors.