For kicks, I stuck a stick in the spokes near the rim to simulate rim braking on my disc-braked bike. It somewhat reduces the flex, but not dramatically. Slighting down the fork, I can definitely see it flex fore/aft a fair amount. This is one of those situations where it is difficult to visualize the internal forces involved. I guess I need to get out pencil/paper and start drawing free-body diagrams.

- Mark