I replaced all 4 tyres on the ZS 180 last October. I got a good price on 4 Hankook Ventus V12 evo2 from Advance Pitstop Ballymount.
However, I'm not really happy with the way the sit on the rim. The seem more rounded than the Continentals before them and definitely not protecting the rim very well. They are the factory specified size 205/45/17.