Please tinker all you want folks but those expensive tires are one of, no in many instances, they are THE most important reason why our Z's perform at a WORLD class level. Skid pad, Drag strip, track, braking, overall handling, etc. It will be my pleasure to replace these tires because that will mean I am not leaving my Z in a garage and only visiting it when I crave the smell of Zaino.
These tires alone at Bragg-Smith make for a 3-4 second difference in track times over a standard C-5. Mine do fine in the rain and C4C5 is right it is their world class width that is the chief factor........ I want my best tread on at all times whenever I get the urge to add 5 more MPH to that little hair pin curve or the high speed sweeper the city so graciously built between my work and my way home.