Tyre Ageing

The complete DOT (Department of Transportation) code is in the following format: DOT MMM SS TTT DDDD where MMM is a 3 digit manufacturer ID; SS is a tire size 2 digit code; TTT is an optional tire type code; and DDDD is the date of manufacture code where the first 2 digits indicate the week of manufacture and the second two digits are the year, i.e.: 2802 would indicate that the tire was manufactured the 28th week of 2002.

Tires manufactured before July 2, 2000 had a 3 digit date code where the first 2 digits are the week of manufacture and the last digit is the year. Tires manufactured in the 1990s had a triangle following the 3 digit code while tires manufactured in the 1980s did not, i.e.: 282 with a triangle would indicate that the tire was manufactured the 28th week of 1992 while if there is not a triangle following the 3 digits it was manufactured in the 28th week of 1982. The newer 4-digit code eliminates any ambiguity in the year of manufacture and allows continuation of the system through the 21st century.

The numbers will be moulded into the sidewall, not something that's stamped on.

Expected age of RV tires is 5-7 years, irrespective of how much tread is left or if cracks are visible in the sidewalls. There's nothing magic or mysterious about these age figures; They're a combination of manufacturers' recommendations and RVers' experiences. Unlike a car, the service of a typical RV is such that it sits for long periods of time. Tires need to be rolling to get the benefit of chemicals that are exuded from the rubber and help to condition the tire.


Try Sinton tyres near milton keynes, they stock most of the sizes of rv tyres that are available over here, they are a tyre wholesaler and will ship the tyres to you and you will then have to get them fitted. They are cooper stockists.

Sinton tyres :01908 665591