QUOTE(CossiBird XX @ May 10 2006, 03:09 PM)

+1, I just switched to an 18t this last weekend, and the only noticeable difference is the 6th gear roll on power. Even that isn't anything serious. Still has plenty to get you around a car. Or whatever else you might want to do. I think the XX shoulda come with an 18t from the factory.
It probably would have if it wasn't a "top speed" bike...
Mike