I just (today i.e about 8 hours ago) put toyo proxies t1s on my fronts, replacing the perelli pzero 205/40 17's i had. I can tell you now, that the grip is awesome, i still had 2mm of tread on my perelli's but decided to change them to see the difference, i now have 1 perreli on my spare and one in the garage, but crikey, the toyo's are so grippy around corners! but the pzero's seem to be more comfortable >100mph. both are z rated. i got the toyo's for 72 pounds including fitting and tracking each.