Tyre wet grip class
How well the tyre brakes on a wet road compared with a reference tyre. A grips best.
- What it looks like on the label
- A cloud with rain over a tyre, beside an A to E scale with the tyre’s class marked (top right of the tyre label).
- Printed on
- Tyre
- Unit
- letter A–E (index G, no unit)
- Regulation
- Regulation (EU) 2020/740, Annex II (content and format), Annex I (grading)
What the regulation says
On a tyre label
- What the number measures
- Wet grip index G: the tyre’s wet braking compared with a standard reference test tyre, minus 0.03.
- Unit
- letter A–E (index G, no unit)
- Test condition
- measured under Annex 5 to UNECE Regulation No 117.
- Classes
- C1 tyres A: G ≥ 1.55 · B: 1.40–1.54 · C: 1.25–1.39 · D: 1.10–1.24 · E: ≤ 1.09
Regulation (EU) 2020/740, Annex I, Part B (grading); Annex II, point 1.1 (label): The wet grip class shall be determined and illustrated on the tyre label on the basis of the wet grip index ( G ) according to the ‘A’ to ‘E’ scale
Checked 2026-09-25.
Other icons on the tyre label
Sources
- Regulation (EU) 2020/740 — Regulation (EU) 2020/740 of the European Parliament and of the Council of 25 May 2020 on the labelling of tyres with respect to fuel efficiency and other parameters. Label content: Annex II (content and format), Annex I (grading). Article 18: “It shall apply from 1 May 2021.” Checked 2026-09-25.
Read in the Official Journal text on the date shown. Our drawing is not the official pictogram; the regulation’s own label figure is the authority.