I just changed to Kumho KU36 all round 235/40/18 with 34GTR rims, reason is the width seem almost the same with my previous Falken912 size 245/40/18 which happens to be crap tires after 60% wear. First impression, a lot of grip in the dry and the steering response which used to feel dead has comes alive. This is only my 1st week with it and just try it in the wet...scary when it's cold but once when you warm it up, the grip gets slightly better.
Now i wondering what would the optimum tire pressure front & rear bcos my tyre shop guy recommended 35psi front and 38psi rear. Felt too stiff as a daily ride, and usually every weekend I would go for a blast & twisties with my mates but after midnight.