Kodak,
A couple of places I use when I am chasing tyres.
One is a local consumer magazine (
Compare products and find independent product reviews with Choice.com.au - CHOICE) which has tyre tests but has some odd priorities when deciding which is the "best buy" in any category.
Another is online forums both for general performance and vehicle specific topics. There is usually someone willing to post an opinion about their favourite brand.
Finally any other person owning the same car as I do.
Supermarket car park meetings or friends and relatives all provide objective feedback most of the time.
Peter.
P