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Frequently Asked Questions

EU Tyre Label: Wet Grip (Braking Performance)

This symbol indicates the grip of a tyre on a wet road. Wet grip is a key factor in relation to the safety performance of a tyre. The effects of the wet grip on road safety are enormous as roads with excellent wet grip significantly reduce the braking distance. The tyre label is classified according to classes "A" to "G", whereby "D" and "G" are not used. The braking distance difference from one class to the next on a wet road at an initial speed of 80 km/h between 1 and 2 vehicle lengths (3.0 - 6.0 m), is on average around 4.5 m . Between class "G" and class "A" there is a total reduction of approx. 30% in the braking distance. In total the braking difference between, for example, Class "A" and "F" is over 18 metres.
  Class Car tyre
index value (G) Light trucks tyre
index value (G) Truck tyre
index value (G)
- A -
≥ 1,55 - -
- B -
1,40 - 1,54 - -
- C -
1,25 - 1,39 - -
- D -
- - -
- E -
1,1 - 1,24 - -
- F -
≤ 1,09 - -
- G -
- - - Boundary values for classification of wet grip (The index value "G" relates to a reference tyre. The classification of the wet category applies initially only to car tyres, the methods for light trucks and trucks are still in development.)