Haven't tried those, but have a full set of Kumho KU39 at that size on the GT4 and they're great

- stood up to several rounds of TSS as well as regular road use, very impressed.

I've since put a pair on the front of the Caldina and they're equally good

- ony thing is they're a bit fussy to balance, had to get the fitters to redo a couple of them.

Jake