I agree with Burgundymog and Milligoon, get some miles on them!
A couple of my friends use them for competition and swear by them, both top runners.
If you still have problems I'd suggest you contact Kumho Australia and seek their advice/opinion.


1969 4/4
1995 plus 8
1996 Plus 4 4seater
2002 Aero S1
2013 M3W
2014 Plus 8