What is the difference between zr19 and r19?

[McAdaline]

zr19 and r19 mainly differ in concept. ZR represents the tire speed rating, designed for speeds exceeding 240 kilometers per hour, indicating a higher grade, while R alone in tire specifications denotes a radial tire. Below are the functions of car tires: 1. Support the entire weight of the vehicle: Bear the vehicle's load and transmit forces and moments in other directions. 2. Transmit traction and braking torque: Ensure good adhesion between the wheel and the road surface to enhance the vehicle's power, braking, and passability; work with the vehicle suspension to mitigate impacts during driving and dampen resulting vibrations. 3. Prevent damage to vehicle components: Protect vehicle parts from severe vibrations and premature wear, adapt to high-speed performance, reduce driving noise, and ensure safety, handling stability, comfort, and energy efficiency.