I had a question about this as well, because I am currently looking for a set of snow tires for my A6qw. So, what are the differences between the Blizzak tire models? I am aware of these models: Blizzak MZ-02 Blizzak WS-15 (Q-rated) WT-05 Winter Radial (H-rated) WT-14 Winter Radial (seems to be for 80-75 series apect ratio sizes in 12-15 rims) '97 A6qw '93 90cs