What does the 'H' on car tires mean?
1 Answers
The 'H' on car tires indicates the speed rating. Each tire has its speed symbol molded on the sidewall, also known as the speed rating, which corresponds to the maximum speed the tire can sustain. A tire with an 'H' rating means it has a maximum speed of 210 km/h. Common speed rating letters for household tires include Q, R, S, T, U, H, V, W, and Y, with 'Y' representing the highest speed rating, capable of reaching up to 300 km/h. The higher the speed rating of a tire, the greater the maximum speed it can withstand, and the stronger the tire's grip during driving. However, tires with higher speed ratings tend to have lower wear resistance because they are made from softer materials, which results in poorer friction resistance and a shorter lifespan.