> Early indications suggest the highly complex and somewhat controversial system consists of two levers mounted on the rear of the frame. The longer of these tw

> Early indications suggest the highly complex and somewhat controversial system consists of two levers mounted on the rear of the frame. The longer of these two levers operates the rear wheel quick-release retention mechanism. The shorter lever guides the bicycle chain across a revolutionary four sprocket cluster on the rear freehub. An interestingly early example of a dangerous “dark UI”.