Has anyone gone to a 190/55-ZR17 back tire yet? I am getting to the edge of my back tire, and it is making me nervous. I still have some more lean angle on my front tire left. I always like to have a little left in reserve, knowing that I am not at the point of crashing my brains out. Also, I was wondering if it changes the feel, somewhat. I am coming up on needing another back tire in the near future.