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Are your tyres out of date?

A problem that’s often overlooked with tyres is their age. If you drive less than the UK average of 8,000 miles a year, your tyres may well become unsafe through ageing before they ever wear out. Tyres left on the rear are more likely to encounter this problem. Doing just 5,000 miles per year it could take up to ten years to wear the rear tyres out, yet they could become unsafe after only five or six years through ageing.

The chronological age of the tyres

The chronological age of any tyre can be found on the tyre sidewall by examining the characters following the symbol "DOT".

For tyres manufactured after the year 1999, the last four numbers identify the date of manufacture of the tyre to the nearest week. The first two of these four numbers identify the week of manufacture (which range from "01" to "52"). The last two numbers identify the year of manufacture (e.g., a tyre with the information "DOT XXXXXX2703” was manufactured in the 27th week of 2003).

For tyres manufactured prior to the year 2000, three numbers instead of four indicate the date of manufacture.

Also, during the early 1990’s, Continental added a triangle (?) to the end of the character string to distinguish a tyre built in the 1990’s from previous decades.

(e.g., a tyre with the information "DOT XXXXXX274?” was manufactured in the 27th week of 1994).

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