The sidewall of a tyre contains a lot of information about the construction and characteristics of a tyre. The image below is an example.
- Tyre size
215 = width in mm
/45 = aspect ratio in %
R = radial construction
17 = heel or rim diameter in inches
91 = Load index
V = Speed index
XL = code to indicate that the tyre is stronger than other tyres in the same size. The symbol replaces the indication ‘reinforced’.
- Factory or brand name
- Pattern or tyre type
- Radial tyre
- Tubeless version
- M+S (Mud and Snow).
Next to M+S is the snowflake symbol on many tires (but this is not mandatory).
- Date of manufacture (41st week 2008)
- E-certificate number
- Country of origin
- DOT (Department of Transport)
- DOT-factory code
- Regulations for the maximum inflation pressure and the applicable tyre load (valid in the USA)
- Indication of the actual number of layers and the material used for them
- TWI (Tread Wear Indicators)
Indication of the position of the wear indicators.