I ran my first autox on them today. There was no shortage of grip even with air temps in the low to mid 60’s. Much more control than I am used to while running on Falken Azenis RT615s (two sets in two years). I do not think I have ever used the brake pedal as well as I was able to today. The Falkens have a tendency to start to roll over onto the sidewall; the Z1’s were clearly not as likely to do so. Once I get more seat time this season I will likely find how to use the extra grip more effectively.
These tires exceeded my expectations … and my driving ability today. Get them.