multimodal commuter
Join Date: Nov 2006
Location: NJ, NYC, LI
Posts: 19,808
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
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My Trek 720 has sometimes had a tendency to shimmy. I've had this bike since 1983 and have had at least five different wheel sets &c on it over the years, at least three different stems, and so on. While I agree with freebooter that we need to be clear about what phenomenon we're talking about, that's easier said than done. For a while on my bike the shimmy went away when I replaced all the rear spokes; I hadn't tensioned the wheel quite right, and the wheel was flexing more than it should. Another time there was a shimmy that went away when I put on a longer stem and moved the seat forward a bit.