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Tyre Information.

The stuff you always wanted to know about tyres. Most common radial tyres have a 3 number designation of size followed by load index number & speed rating letter. eg  215/55R16  97W

215 is the tyre section width in millimetres.  55 is the aspect ratio in % (the height of the sidewall divided by the tyres width).  R denotes radial.  97 denotes the load carrying capacity ( see following chart). The letter W denotes the speed rating (see following chart).  Please note that the following chart does not give full information & is for reference only.

Speed symbol       max speed(mph)             Load index         Load Kgs

    L                                 75                                 70                     335

    M                                81                                 75                     387

    N                                87                                 80                     450

    P                                 93                                 85                     515

    Q                              100                                 88                    560

    R                               106                                90                     600

    S                                113                                93                    650

    T                                118                                95                   690

    U                               124                                97                    730

    H                               130                              100                    800

    V                               150                               102                   850

    W                              168                               105                  925

    Z                       over 150                              108                  1000

    Y                               186                               115                   1215