You know what to do
Linked-to page has a semi-interesting pdf file you can either download or open up in your browser (if your settings allow; need scripting activated).
There is polling within based upon input from those in the tire industry.... appears to be from retailers.
I found it interesting with a few, but not many, surprises.
I opted for Bridgestone with my latest tire purchase and from what I see in this study it appears my extensive research took me down the right path.... at least in relation to those inputting for the study.