This patent discloses one wheel unicycle with drive mechanism providing gear ratio, seat tube and steering mechanisms with pendulum weight support mechanism, reverse torque braking system and standby anti-tip wheels. Drive mechanism comprises of a pair of drive assemblies mounted on the ends of the hub of the wheel. Each drive assembly consists of a special type of gear (SBE) in which plurality of planetary gears and a gear ring are arranged in such a way that gear ring can be rotated via pedal which in turn rotates planetary gears along its direction of rotation. Hub of the wheel at each end is coaxially connected to top planetary gear via one way ratchet ball bearing. Planetary gear on rotation rotates the wheel. Larger radius of the gear ring than planetary gears accounts for gear ratio. Drive mechanism doesnt come in contact with clothing of the rider. Reverse torque brake system and standby anti-tip wheels provide protection against tipping off.
