My gen2 2009 had a 180/55 zr17 on when I purchased her. No issues handling wise. Going to try a pair of Angel ST 120/70 zr17 front & 190/50 zr17 rear next.
My girl, still not named after 9 months.....
R1 forks, 6 pot calipers, fat boy bars, goodridge braided lines, K&N filter & Leo Vince SBK can. I need to get working on this......