Being winter, with too much time on my hands, I ordered the ball bearing shifter kit from Murph's. I had to wait a few days, until the outside temp raised a few points, to try it out. Have to say, I am impressed. It is surprising how a little thing like that can make your whole bike feel better. The shifts are so smooth and precise. Makes the bike feel like it's built like a Swiss watch. The kit is inexpensive, easy to install, and really does some good. What's not to like?