What is written on the side of a tyre
The sidewall of a tyre contains a wealth of information on its construction and properties. In the illustration below, the different types of information/properties are indicated by numbers. These parts are described below.
- Tyre size
215 = tyre width in mm
/45 = aspect ratio in % R = radial construction in mm
R = Radial construction
17 = Bead or rim diameter in inches
91 = Load capacity index
V = Speed symbol (speed index)
XL = Use code to indicate that the tyre is stronger than other tyres in the same size.
The symbol replaces the reinforced marking.
- Manufacturer or brand name
- Profile or Tyre Type
- Radial tyre
- Tubeless construction
- M+S (Mud and Snow). In addition to M+S, many tyres also carry the snowflake symbol (but this is not obligatory).
- Date of manufacture (41st week 2008)
- E-Certificate number
- Country of Origin
- DOT (Department of Transport)
- DOT factory code
- Regulation of the maximum inflation pressure and the corresponding tyre load (valid in USA)
- Indication of the actual number of layers and the material used for them
- TWI (Tread Wear Indicators) Indication of the position of the tread wear indicators