I'm currently running the Pirelli CorsaIII on the rear with a rosso on the front - good combination btw, as I found the CIII front to be a little lacking in grip when pushed. I find generally, that the bike is harder than it should be to turn in and hold a line...I find I have to muscle it around a fair bit if I am really having a "go". Accepting that the suspension and geometry is pretty good, I'm fairly convinced that it is the profile of the rear tyre (190/50)...It has been suggested that going to a 190/55 on the rear will help the initial roll-in alot more and will help keep the bike on track mid-corner easier. Does anyone out there have a few thoughts on this, and why this might be the case? Ta.