A ridable kart can have a body that supports a front wheel and movable rear wheels. The kart can include a motor that supports and drives the rear wheels. The motor and rear wheels are configured to tilt and rotate relative to the body of the kart. The body of the kart includes a concave space in which the front and rear wheels are positioned so that they are at least partially concealed by the body when viewed from the side of the kart.

An auxiliary wheel unit of a bicycle contains a connection portion mounted on a body of the bicycle on a side of a rear wheel of a bicycle, and is rotatably supported by the connection portion on one end side in a longitudinal direction. A movably leg swings between a standing position and an upturn position, a locking piece is rotatably supported by the movable leg and is engaged with the connection portion at the standing position of the movable leg, the connection portion. A spring is connected to the movable leg so as to abut against the connection portion and the locking piece in opposite directions so that the swinging direction of the movable leg changes between the standing position and the upturn position of the movable leg. In addition, an auxiliary wheel is attached to the other end of the bicycle.

An auxiliary wheel unit of a bicycle contains a connection portion mounted on a body of the bicycle on a side of a rear wheel of a bicycle, and is rotatably supported by the connection portion on one end side in a longitudinal direction. A movably leg swings between a standing position and an upturn position, a locking piece is rotatably supported by the movable leg and is engaged with the connection portion at the standing position of the movable leg, the connection portion. A spring is connected to the movable leg so as to abut against the connection portion and the locking piece in opposite directions so that the swinging direction of the movable leg changes between the standing position and the upturn position of the movable leg. In addition, an auxiliary wheel is attached to the other end of the bicycle.

A training aid to teach balancing skills for a central wheel structure auto-balancing device and an auto-balancing device having same. The training aids may be variously configured and may be releasably or fixedly coupled to the foot platforms of the auto-balancing device. Disclosed embodiments include various ground contact members and various support structures that hold the ground contacting members. The training aids may be compressive and/or offer ground resistance. The height of the aids, their compressive strength and/or their resistance, among other features, may be adjusted.

A training aid to teach balancing skills for a central wheel structure auto-balancing device and an auto-balancing device having same. The training aids may be variously configured and may be releasably or fixedly coupled to the foot platforms of the auto-balancing device. Disclosed embodiments include various ground contact members and various support structures that hold the ground contacting members. The training aids may be compressive and/or offer ground resistance. The height of the aids, their compressive strength and/or their resistance, among other features, may be adjusted.

A ridable kart can have a body that supports a front wheel and movable rear wheels. The kart can include a motor that supports and drives the rear wheels. The motor and rear wheels are configured to tilt and rotate relative to the body of the kart. The body of the kart includes a concave space in which the front and rear wheels are positioned so that they are at least partially concealed by the body when viewed from the side of the kart.

The present invention is a support wheel adjustment mechanism for a bicycle provided on either side of bicycle. Each support wheel mechanism includes a first element, a second element, a swivel hinge connection, an adjustable element and a fixing element. First element and second element are connected with each other by swivel hinge connection. Adjustable element has one end portion connected with hinge connection with first element and another end portion is selectively connected to any of adjustment openings such that support wheels are achieves desired elevation from ground. Adjustable element is secured in adjustment openings by use of fixing element.

The present invention is a support wheel adjustment mechanism for a bicycle provided on either side of bicycle. Each support wheel mechanism includes a first element, a second element, a swivel hinge connection, an adjustable element and a fixing element. First element and second element are connected with each other by swivel hinge connection. Adjustable element has one end portion connected with hinge connection with first element and another end portion is selectively connected to any of adjustment openings such that support wheels are achieves desired elevation from ground. Adjustable element is secured in adjustment openings by use of fixing element.

An improved enclosed electric motorcycle has an electric motor directly driving the rear wheel with a chain or a belt. A pair of steering handles and an accelerator foot pedal enables a driver to drive the motorcycle like an automobile. The pair of the landing wheel assemblies individually has a take-up assembly to reduce their sprung weights, and has an electric motor to increase reliability. By adding a pair of anti-skid wheels, the driver can avoid many accidents. An inflatable safety belt and a pair of side airbags will protect the driver in an accident. If the battery pack explodes, it will be ejected away from the motorcycle to protect the driver. A drive-in electric engaging device enables the driver to drive the motorcycle to engage with a stationary charging station for charging its battery pack while parking.

A training wheel system is provided that can improve packaging, shipping, and installation. The training wheel system includes a bracket for maintaining the orientation of a training wheel arm. In one form, the bracket can nest within a channel of a portion of the training wheel arm.