Below are all the data points for the 2015 Auto Bild Performance Winter Tyre Test, displaying how each tyre performed across all test categories. The spider chart below provides a complete overview of performance, where one hundred percent represents the best performance in each category. The larger the area covered by each tyre's plot, the better its overall performance.
How to read these charts:
For each test category, data is presented relative to the best performing tire. The direction indicates whether lower or higher values are better - pay close attention to this when interpreting results.
Spider chart cannot be displayed because there are no test categories common to all tires.
What temperature where the wet tests taken under. I thought winter tires out performed summer tires at lower temperatures in the wet.
Auto Bild didn't list the temperatures. The tyre companies list 7c as the crossover point between summer and winter tyres, but in reality it's much closer to freezing.
How come the only "A" rated tyre for wet tracktion - Nokian D4 is showing such poor wet results ... just a five... Are Nokian bending the truth? Is the standard set up in a way that is not objectively measuring the behavioral/performance aspects of the tyre? Is the test bias towards the big 5 (4 in this case I see no Bridgestone and Goodyear they can not be worse than Horizon .....) ?
The tyre label only tests one category, wet braking, whereas Auto Bild have tested wet braking, handling, circle, and aquaplaning scores meaning they give a much more complete view of a tyre's wet performance.
That said, the Nokian was still only 5th best under wet braking (6th if you count the summer tyre), but we're extremely confident it is no test bias involved. Test conditions can change the balance of test performances but quite a margin.