Part B: Wet grip classes

United Kingdom

1. 1Division 1
2. 2The wet grip class of C2 and C3 tyres must be determined on the basis of the wet grip index ( G ) according to the ‘A’ to ‘G’ scale specified in the table below, calculated in accordance with point (3) and measured in accordance with ISO 15222:2011 whereby the following Standard Reference Test Tyres (SRTT) must be used:
3. 3Calculation of wet grip index (G)