New versions carry a rechargeable power source, and their 30-watt halogen elements give off about as much illumination as a car headlight. Mountable flashing taillights offer a great deal of added safety for road-riding after dark. This provides greater pedaling efficiency and more power per pedal-rotation. Racing saddles, the smallest and lightest, are made to add the least weight for racing situations. Others, designed more toward comfort, incorporate more padding.
Saddles are interchangeable, and there are dozens of types to choose from.
Seat bags are available in various sizes. They attach in the space just beneath the rear of the seat and allow you to carry a tool kit, spare tube and patch kit, C02 tire-inflater or other small items.