The speed symbol is a letter indicating the speed at which the tire has been tested to carry a load corresponding to its load index. In the example above, the speed symbol“ R” in the service description means a maximum speed rating of 106 miles per hour (170km/h). Excessive speed is not only unlawful and may cause injury, but inflation pressure needs to be adjusted while load carrying capacities decrease. Consult the rim/wheel manufacturer for rim wheel load and inflation capacities.
Road Mavin