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On the sidewall of a tyre you will find various codes and markings. Amongst these you will find the size.
Tyre sizes are made up of a number of different numbers and letters. For example tyre size 185/60 R 14 82 H is made up of the following information:
Aspect ratio is the ratio of a tyre's width to it's height. A 60 series tyre, therefore, is a tyre whose height is equal to 60% of its width.
All tyres carry a speed symbol in the form of a letter indicating the maximum speed for which the tyre is intended. The table below shows which speed goes with each letter.
The load-index figure imprinted on the sidewall of the tyre denotes the maximum load capacity of a tyre when driven at maximum speed. A list of load indices and maximum weights is give
Tyres carry a three digit age code on the sidewall indicating the month and year of manufacture. For example 129 means the tyre was manufactured in December 1999.
M+S - Identifies Mud and Snow tyres
DOT Codes - Coding satisfying the requirements of the US Department of Transportation contain a mixture of letters and numbers such as DOT DVDE MTA 129
E-Marks - Tyres for sale in the European Community must carry an E -Mark in accordance with ECE Reg 30 - eg E4 027550
The main function of a tyre is to carry the load of the car. Therefore, it is vital that correct air pressure is maintained. Over-inflation will cause rapid and irregular wear.
Under-inflation will damage the tyre structure leading to possible accidents.
Improper air pressure will not allow the tyre to function within its design. For best performance maintain the air pressure recommended by the vehicle manufacturer and/or the tyre
Prices include VAT and delivery within mainland UK (excl. Scottish Highlands).
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