Originally Posted by
fujidon
I have that very bike and haven't noticed any sort of wobble. Maybe it was something specific to your bike... or maybe it's because I rarely go much faster 30mph
Likely something specific to Johnny V, ( or some difference between you and Johnny V). Speed wobbles are the result of oscillation at a resonant frequency. You have to have the right conditions for it to occur. So while some bikes tend to be more prone to the wobbles, whether your bike does, depends on a lot of factors, including your weight, and position on the bike, grip, speed, etc.
So that exact bike could wobble horribly for one rider and not at all for another.