Many years ago I put a wider rear tire on my '95 Kawasaki Concours. The handling in the twisties was moderately affected but the slow speed handling was so greatly improved that I have stuck with it. That experience has me considering going to the Darkside on my '08 GL1800. One thing I haven't seen discussed during my research is using a wider m/c tire instead of a c/t. Perhaps it isn't possible. Anyone know?