Tyre Sidewall – What's What?

How to Read Tyre Sidewall Markings

1. TWI Indicator: Shows tread wear markers – if flush, tyre is unsafe/illegal.
2. Tyre Size Designation: Width, aspect ratio, rim, load, and speed index.
3. Radial (R): Indicates radial ply construction.
4. Tubeless: No inner tube required, 'E/e' = EU/UK approval.
5. Tyre Name: Commercial model name.
6. Safety Warning: Use correct pressure/load. Misuse risks injury.
7. ‘E’ Marking: Required on all UK tyres since 1997.
8. Directional Pattern: Arrows show correct rotation. Wrong fit = MOT fail.
9. Manufacturer/Brand: For impartial advice call 01744 808586.
10. Country of Origin: Where the tyre was made.

Other Tyre Markings

• Reinforced: Higher load capacity (common on vans, caravans, estates).
• M + S: “Mud & Snow” marking for winter tyres.