Tire Speed Rating Codes

But tire makers test their own tires and assign their own speed ratings.

Tire speed rating codes. Tire speed ratings range from a the lowest to y the highest. Here are the most commonly used speed rating codes for cars in europe and usa. Definition of tire speed ratings a tires speed rating is an indication expressed as a letter code on the tire sidewall of a speed the manufacturer expects the tire to be able to sustain over a long period of time without coming apart. For example h is between u and v with the common perception that h stood for high performance at one time.

A t speed rating indicates the tire is approved for speeds up to 118 mph 190 kmh under optimal conditions. On the sidewall of every tire youll find one of these speed rating codes. Tires with a speed rating higher than 300 kmh 186 mph are indicated by a y in parentheses. As manufacturers continue to add speed to their vehicles.

Here 100 is the load rating of the tire and speed rating is v which indicates a maximum speed of 149 miles per hour. The origin of speed ratings. W speed rating a w speed rating means the tire is approved for speeds up to 168 mph 270 kmh under optimal conditions. The available codes were sr 180 kmh 112 mph hr 210 kmh 130 mph vr in excess of 210 kmh 130 mph.

For the complete listing of rating codes scroll below. N up. As a general rule tires with higher speed ratings also handle better at slower speeds. T speed rating.

But the chart is not completely in alphabetical order. Prior to 1991 tire speed ratings were shown inside the tire size before the r construction type. M up to 81 mph.