With a shaft drive transmission, a gear confirmed at the bottom bracket turns the shaft, which then turns the rear wheel via a gear firm connected to the wheel's Bicycle Parts hub. There is some small debt of efficiency due to the two gear sets needed

Saddles also vary with rider preference, from the cushioned ones favored by short-distance riders to narrower saddles which allow more chance for leg swings. Enjoyment depends on riding position. With abundance bikes and hybrids the cyclist sits high over the seat, their weight directed down onto the saddle, such that a wider and more cushioned saddle is preferable.