Tire Speed Rating

Tire speed rating or the speed index/symbol specify the top speed at which the tire can carry a load corresponding to its load index, under service conditions specified by the manufacturer.

The speed rating is identified as a part of the tire size designation or the tire’s service description, together with the load index.

The speed rating system as it is used today was developed in Europe as a response to the need for classifying tires into standardized speeds. It describes the top speed for which a tire is certified.

Speed rating on tires is expressed by a letter from A to Z (the speed symbol), ranging from 5 km/h (3 mph) to above 300 km/h (186 mph). For e.g. the letter "V" defines the maximum speed limit at 149mph/240 kph (Please see the tire speed rating chart below).

"Z" Ratings

A tire rated with the letter "Z" in the tire size designation (i.e. P275/40ZR17 93W or 275/40ZR17 93Y) is the tire which have a maximum speed capability above 240 kph/149mph. Tires having a maximum speed capability above 300 km/h (186 mph) must have "Z" in the size designation and the service description must include Y in parenthesis (i.e. P275/40ZR17 (93Y)).

Tire Speed Ratings Chart

Please note that the chart data should be verified with the tire/wheel manufacturer. This is for informative purposes only.

Speed Symbol Speed (mph) Speed (km/h)
E 43 70
F 50 80
G 56 90
J 62 100
k 68 110
L 75 120
M 81 130
N 87 140
P 94 150
Q 100 160
R 112 180
S 112 180
T 118 190
U 124 200
H 130 210
V 149 240
W ZR* 168 270
Y ZR* 186 300
(Y) ZR** Above 186 (consult manufacturer) Above 300

* Tire manufacturer may or may not (is not obligated to) include a "Z" in the size designation.

** Tire manufacturer must include a "Z" in the size designation.