A chainless bicycle is a bicycle that transmits power to the driven wheel through a mechanism other than a metal chain.

• Directly driven bicycle (see penny-farthing and unicycle)
• Shaft-driven bicycle
• Belt-driven bicycle
• Hydraulic bicycle (and pneumatic bicycle)
• Hybrid vehicle (see series hybrid bicycle)
• Some rowed bikes use a cable or a linkage.
• Stringbike the pulley-driven Hungarian designed bike

• Bicycle drivetrain systems
• Outline of cycling

• Anne Eisenburg (October 23, 2010). "Bicycles, Unchained and Grease-Free". NY Times. Retrieved 2010-10-28.