New answers tagged touring-bikes
I found it is called speed wobble. It can come from loose headset, loose spokes, bad tire, misaligned wheel, too-high saddle (http://www.roadbikerider.com/advanced-skills/speed-wobble), geometry and physiology might be the problem (http://cyclingtips.com.au/2011/03/speed-wobble-when-the-bike-shakes-its-head/). One way to avoid it is to hold the top tube in ...
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