A bit more on "Wet grip"
Wet Grip
The official line:
This relates to the tyres ability to stop quickly on wet roads and is expressed in terms of stopping distance. The difference between A and F is more than 18 metres stopping distance.
What we think:
It only demonstrates straight line braking performance and does not cover safety critical parameters such as; grip on dry roads, cornering grip on wet roads or aquaplaning performance. I’m afraid that we have further issues too; since the tyre manufacturers announced their label values there have been a bunch of independent tyre tests that paint a very different picture.
The most prominent example was highlighted in the Auto Express summer tyre test 2012. Michelin had just released the new Energy Saver + and in the tyre size 205/55R16 it carries a label with wet grip rating of A. However Auto Express quoted the following, “it was the worst performer across our wet test track tests. It finished seventh (out of 8) in our wet braking assessment, as it took three metres longer than the best to bring the car to a halt, while it also struggled in aquaplaning (straight 8th, curved 7th) and wet handling (8th). You could clearly feel the limited grip from behind the wheel, with poor traction and lack of balance.”
Personally I'm also very cynical of this test/results, which I why i run all-season tyres; I'm pretty sure from my own experiences that even in summer; these tyres are so much safer and more competent than summer tyres on a van, in poor summer weather conditions. Just my opinion.
Wet Grip
The official line:
This relates to the tyres ability to stop quickly on wet roads and is expressed in terms of stopping distance. The difference between A and F is more than 18 metres stopping distance.
What we think:
It only demonstrates straight line braking performance and does not cover safety critical parameters such as; grip on dry roads, cornering grip on wet roads or aquaplaning performance. I’m afraid that we have further issues too; since the tyre manufacturers announced their label values there have been a bunch of independent tyre tests that paint a very different picture.
The most prominent example was highlighted in the Auto Express summer tyre test 2012. Michelin had just released the new Energy Saver + and in the tyre size 205/55R16 it carries a label with wet grip rating of A. However Auto Express quoted the following, “it was the worst performer across our wet test track tests. It finished seventh (out of 8) in our wet braking assessment, as it took three metres longer than the best to bring the car to a halt, while it also struggled in aquaplaning (straight 8th, curved 7th) and wet handling (8th). You could clearly feel the limited grip from behind the wheel, with poor traction and lack of balance.”
Personally I'm also very cynical of this test/results, which I why i run all-season tyres; I'm pretty sure from my own experiences that even in summer; these tyres are so much safer and more competent than summer tyres on a van, in poor summer weather conditions. Just my opinion.