Enter your tyre size

How to check your tyre size
Tyre size calculator, showing how to calculate your tyre size. Image of tyre profile size.
Tyre size calculator, showing how to calculate your tyre size. Image of tyre rim size.
Tyre size calculator, showing how to calculate your tyre size. Image of tyre load speed.
Tyre size calculator, showing how to calculate your tyre size. Image of tyre speed symbol.
Tyre size calculator, showing how to calculate your tyre size. Image of tyre width size.
  • Width

  • Profile

  • Rim

  • Load

  • Speed

Tyre size calculator, showing how to calculate your tyre size. Image of tyre width size.
Indicates the section width of a tyre in millimetres.
Tyre size calculator, showing how to calculate your tyre size. Image of tyre profile.
The sidewall height measured from the base of the tread to the rim. This number represents a percentage of the tread width. Low profile tyres have smaller aspect ratio percentages.
Tyre size calculator, showing how to calculate your tyre size. Image of tyre rim size.
Indicates the diameter of the wheel rim. So if you are buying wheels for existing tyres, this is the size in inches you will require.
Load indicates the maximum load capacity at which a tyre can be safely operated, subject to the tyre being in sound condition, correctly fitted and with the recommended inflation pressure. See table below for load index and the maximum load per tyre.

Load index 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
Max load/tyre (kg) 487 500 515 530 545 560 580 600 615 630 650 670 690 710 730 750 775
Speed symbol is a code which indicates the speed at which a tyre can be safely operated, subject to the tyre being in sound condition, correctly fitted and with the recommended inflation pressure.See table below for passenger tyre speed symbol ratings.

Symbol E F G J K L M N P Q R S T U H V W Y Z
Rating 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 240 270 300 240+
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