# Tyre Knowledge

Speed Index

(SI)

In this table you can find the speed index and the conversion to mph.

This index stands for the registered maximum speed of the tyre. You can find the speed index on the sidewall of the tyre.

Example:

150/70 R 17 M/C 69 V TL

Speed Symbol Speed (mph) Speed (km/h)
B 31 50
J 62 100
K 68 110
L 75 120
M 81 130
N 87 140
P 93 150
Q 99 160
R 106 170
S 112 180
T 118 190
U 124 200
H 130 210
V 149 240
Z > 150 > 240
W 168 270
(W) > 168 > 270