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II TYRE MARKINGS
14th June 2007, Page 24
14th June 2007
Page 24
Page 24, 14th June 2007
— II TYRE MARKINGS
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What do the marks on the side of a tyre
such as 315/80 R22.5 754/150 M indicate?
The 315 indicates the tyre width in millimetres and the 80 stands for the cross-sectional ratio of height to width as a percentage figure.
R refers to the design of the tyre in this case, it's a radial while 22.5 shows you the nominal rim diameter in inches.
The next figures refer to the load indices of tyres 154 means that as a single-tyre fitment it has a load capacity of 3,750kg and the 150 shows it has a twin-tyre fitment load capacity of 3,350kg.
Speed ratings are shown by the last capital letter on the tyre. For your tyre, the maximum speed it should run at is 130ktri/h (81mph).