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A disparaging term used by cyclists to describe the rider who, by habit, intent or simple testosterone poisoning, rides ahead of his riding partners by a half bike-length or less, regardless of pace. In the pursuit of camaraderie and convivial side-by-side riding, this results in the group's pace increasing each time the riding companions pull alongside, only to have the halfwheeler move foot or two ahead again, even at the faster speed.
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