donline dating - Tyre dating marks

This lists only addresses Passenger, Truck, and Motorcycle tires (3 separate lists!

) So looking at the DOT code to the left - the plant code is "VW" = Sumitomo in Osaka, Japan - and the size code is "VK" = 255/50R16 (or maybe something else! The exact coding is up to the tire manufacturer - and is different between tire manufacturers.

So the plant code to the right is "B6" = Michelin in Spartanburg, SC, USA - and the size code is "D0" = 175/65R13 - and the exact tire is identified by "A83X" The format is week/week/year/year or week/week/year. Starting in the year 2000, the date coding used was 4 digits. 19 are transition years, so you will find both 3 and 4 digits used in tires produced in that time frame.

Please Note: The date code only has to be on one side – and it is permissible for there to be a partial DOT code, so long as one side has the complete code.

First number is the number of bolts (in our case 5).

The number 112 indicates the so-called PCD (Pitch Circle Diameter) which is the diameter of an imaginary circle drawn through the center hole of the screws on which the wheel is mounted.

The coding is optional, but since many tire manufacturers use the code to track returns, I don't know of anyone who doesn't use this coding.

The photo to the right indicates that the "X" is for Michelin.

Here's a web site that has an old version of the plant codes: From time to time, this gets updated, but don't depend on this being 100% right.

So if you look "5M" on the web site linked above you should get Bridgestone in Sao Paulo, Brazil.

ET is the offset, that is the distance between the centerline of the wheel and the plane of the hub-mounting surface of the wheel.

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