Division 2 Calculation of wet grip index (G)
United Kingdom
G = G(T)-0,03
where:
G(T) = wet grip index of the candidate tyre as measured in one test cycle
| C1 tyres | C2 tyres | C3 tyres | |
|---|---|---|---|
| Wet grip class | G | G | G |
| A | 1,55 ≤ G | 1,40 ≤ G | 1,25 ≤ G |
| B | 1,40 ≤ G ≤ 1,54 | 1,25 ≤ G ≤ 1,39 | 1,10 ≤ G ≤ 1,24 |
| C | 1,25 ≤ G ≤ 1,39 | 1,10 ≤ G ≤ 1,24 | 0,95 ≤ G ≤ 1,09 |
| D | 1,10 ≤ G ≤ 1,24 | 0,95 ≤ G ≤ 1,09 | 0,80 ≤ G ≤ 0,94 |
| E | G ≤ 1,09 | G ≤ 0,94 | G ≤ 0,79 |