When I first bought my bike it felt twitchy to the point where I could not take hands off the bar for for than 2 seconds. It was actually so bad I felt there was some problem. After carefully pondering this situation for a while, I began to take careful measurements over a period of months. I found that the wheels were not in line, one behind the other, and had a slight offset of 3 mm. Furthermore, by using a carpenters level of 16 inches (43 mm) I also found the front and back wheels were not plumb. With more pondering, the problem seemed to be the drop outs were incorrectly inserted in the fork, with one side higher than the other. Once I felt certain this was the problem, I took a round file to the aluminum drop out and filed a bit. I did this several times over a period on months, evaluating stability after each bout of corrective surgery. Now I can take hands off the bar for short periods of time, clearly a big improvement but still less than ideal. The best part is that the bike holds a much better line in corners, particularly when diving into quick switchbacks and feels more stable at speed while descending.

The geometry at the drop out is such that a error of 1/2 mm at the axle produces an error of about 4 mm at the rim. Right now the wheels are exactly in line and plumb. I've concluded the the fork has too much rake so that there is considerable wheel flop. I don't think I'll buy a different fork because I'm not that dissatisfied but it is on my mind.