Cyclaholic, your explanation reads like my physics textbook, so I doubt anybody who tries to find flaws with it will have much success. That being said, even though gyro forces really don't do much for stability most of the time, on high speed descents (40+ mph) I can feel a stabilizing force which I believe to be gyroscopic in nature- like the bike stays up without any balancing necessary on my part. City smasher, even just on the face of it, physics aside, It's usually (always) futile to dispute the likes of Jobst and Sheldon.