Below are all the data points for the 2018 Ace 235/45 R18 Summer 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.
I love my Zlines on Mercedes CLK V8 Cabrio. In NE USA, I don't drive it in winter, but sometimes in cold/wet, so it's perfect....performance tire w/all-season compound.
"It's not often you see a tyre test where the highest placed premium manufacturer is placed in fifth place, and often test winning Goodyear and Michelin brands are eighth and ninth respectively..."
While that's true, it is probably slightly modified by the following:
-a Michelin PS4 or PS4s would have probably been a rather better scorer in this sort of test than a rather middle-of-the-road Prim 3. Doesn't make them 'better' tyres but in what is largely a performance test sporty tyres would score better. And, if you are going Primacy, why not Prim 4 rather than 3?
-Similarlry for Conti, a SportContact would surely have been a better scorer.
(Which all raises questions about what the Marketing depts at those companes were thinking when they selected whch tyres to submit.)
And then there is wear. There does not appear to be a score for wear and I'd be prepared to bet that both the Conti and the Michelin would move up the order a bit if their wear scores were included with a reasonable weight..