Tyre Speed Rating

What is a tyre's speed rating?
The speed rating for the tyre is the maximum speed a tyre can be safely driven under its recommended load capacity.

Ratings can start from as low as B, indicating 31MPH up to Z which can reach speeds of 150MPH for specialist performance tyres used in racing. 

Speed ratings are based on scientific tests where the tyre is run at speeds in 6.2 mph steps in 10-minute increments until the required speed has been met. 

Being aware of the speed rating of your tyres will allow you to determine the maximum speed your tyres are able to safely maintain.

The higher the speed a tyre is driven, the more heat that is generated, therefore it is vital you do not exceed the speed rating and wherever possible do not fit tyres of different speed ratings. Choosing a tyre with a lower speed rating than recommended by the vehicle manufacturer can invalidate an insurance policy and risk tyre failure.

Where to find the speed rating on a tyre
The speed rating can be found on the tyre sidewall as a single letter after the load index. The speed rating will always be indexed as a letter and usually always follows the load rating as the last piece of information on the sidewall. 

Tyre Speed Rating

Tyre speed rating table
The below table displays the tyre’s maximum speed and its rating:

Rating Symbol

Speed (km/h)

Speed (mph)

B

50

31

C

60

37

D

65

40

E

70

43

F

80

50

G

90

56

J

100

62

K

110

68

L

120

75

M

130

81

N

140

87

P

150

93

Q

160

99

R

170

106

S

180

112

T

190

118

U

200

124

H

210

130

V

240

149

W

270

168

Y

300

186

ZR

Over 240

Over 150

Need more help? Find your local Maxxis dealer.

Related pages

Tyre Fitting

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Tyre Rotation

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Tread Depth

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