I am staying with 180/55 rear. The bike feels good with this size and drop's down nice'n'quick. :biggrin I go with the thought that a bigger tyre = a rounder tyre = slower to tip into a corner. Then maybe that is me :confused - each to their own. I know there are many who would stay at 180 and an equal number who would choose the 190's.They're supposed to be great! I'm running Corsa's at the moment, but I've just picked up a pair of corsa III's to go on, mainly cos I'm going from a 180/55 to a 190/55 rear.
What size are you putting on?