Found after the rim size (e.g., 91V), this tells you the tyre's load and speed capabilities. It's vital for safety to match or exceed your vehicle manufacturer's recommendation.

• Load Index (e.g., 91): This number corresponds to the maximum weight (in kg) a single tyre can carry when fully inflated. A higher number means a higher load capacity.
• Speed Rating (e.g., V): This letter indicates the maximum speed the tyre can safely sustain. For example, 'V' is rated up to 149 mph (240 km/h).

Look for these letters to identify special tyre technologies or recommendations.

• Run-Flat Tyres (RFT): These have reinforced sidewalls that let you drive for a limited distance after a puncture. Markings include RFT, SSR, ZP, ROF, or DSST.
• Original Equipment (OE): Tyres developed for a specific car manufacturer. Markings can include * (BMW), MO (Mercedes), AO (Audi), N (Porsche). Using OE tyres is recommended for optimal performance.
• Winter & All-Season: The Three-Peak Mountain Snowflake (3PMSF) symbol indicates certified winter performance. M+S (Mud and Snow) is a less stringent all-season marking.

The "DOT" code is the tyre's serial number. The most important part is the date code at the very end.

• Date Code: The last four digits tell you the week and year of manufacture. For example, 3223 means the tyre was made in the 32nd week of 2023.
• Tyre Age: It is recommended to replace tyres that are over 10 years old, regardless of tread depth, as the rubber compound degrades over time.