That they consider the performance adequate? That's what I always look for in a performance tire! Shame this chart lacks ordinal temperatures. And is in Japanese. Looks fast, though
e: google translate was kicking my ass until I realized "gurippu" isn't translating because it's a phonetic spelling of "grip", hahaha. So, yeah, up/down is grip. Can anyone here translate that page? How much better will the star spec be than the ZII?