https://www.chinaotr.com/the-advantages-of-radial-tires-and-considerations-when-using-them.html Ⅰ. The definition of radial tires Radial and bias tires are a structural form of tires, which are different from bias tires, arch tires, and pressure-regulated tires. The international code for radial tires is "R", commonly known as "wire tires". Our company offers radial snow tires.All Rights Reserved