Permon wrote: btompkins0112 wrote:
NGMN wrote:Can we agree once and for all that you seem to be talking about stability and not stiffness??
Whatever we call it, is this a standard R5 behaviour?
Your video shows shimmy, or "speed wobble." It doesn't look like you are even going fast in that video, though hard to tell - which is surprising because IME speed wobble usually presents itself at speeds over 30mph, even more commonly at speeds over 40mph.
Everyone points to the headset first, and that can definitely be the culprit, but speed wobbles are notoriously difficult to diagnose, because they can be caused by any one or more combination of things, including frame, fork, headset, wheels, stem/bar, rider position... it's something you really have to diagnose by changing one variable at a time. And even then, it can be difficult, as some speed wobbles seem to present at certain speeds, while others seem to be induced by crosswinds...
It's not a permanent solution, but for safety, next time you get a speed wobble, try to avoid a death grip on the bars, and grab the top tube with your legs. Your legs will absorb the wobble and absorb the vibrations that are harmonically resonating and allowing the wobble to occur and worsen.