What is the tyre speed index?

This is the maximum speed that a tyre can be driven at without risk of a blow-out. From A, the slowest, to Y, the fastest.

Correlation table of speed indices:

Index Speed Index Speed Index Speed
A1 5 D 65 Q 160
A2 10 E 70 R 170
A3 15 F 80 S 180
A4 20 G 90 T 190
A5 25 J 100 U 200
A6 30 K 110 H 210
A7 35 L 120 V 240
A8 40 M 130 ZR >240
B 50 N 140 W 270
C 60 P 150 Y 300

NOTE:

  • It's possible to fit a tyre with a higher speed index than the one recommended by your manufacturer.
  • For winter tyres, you can have a speed index one letter lower. For example, if your summer tyre markings read 205/55 R16 91 V, you can fit a winter tyre with the following markings: 205/55 R16 91H.