A variable-attitude system is applicable to the wheels for children's bicycles and mini motorbikes, essential in the early learning phase, and facilitates and speeds up correct use. The mechanism described allows progressively reducing the balance support provided by the I, supplementary wheels (3) by adjusting the pressure of a spring (8). Moreover, the wheels (3) can be eliminated, much earlier and gradually, by moving upwards a stop pin (6) or screw that raises the arm (2) that supports them, moving them progressively away from the running plane (12).

The present disclosure is directed to lean angle indication for motorcycles. The disclosure provides a motorcycle lean angle indication device that is operationally configured to be attached to a motorcycle and contact a surface that a motorcycle is traveling upon when the motorcycle realizes a target lean angle when executing a turning maneuver.

A vehicle (1) is provided and includes a frame (10), a seat (20), front and rear wheel sets (1012, 1014) provided at front and rear ends of the frame, and a handlebar (30). A wheel set is an adjustable wheel set that includes a wheel support (1016), a first wheel (52b) and a second wheel (52c) rotatably supported on the wheel support. The wheel support includes a first connector (60) pivotably mounted to the frame for pivoting movement about a connector axis that lies in a generally vertical-longitudinal plane. The wheel support is pivotable between a first position in which the wheel support holds the first and second wheels canted such that their upper ends are closer together than their lower ends, and a second position in which their upper ends of the first and second wheels are farther from one another than their lower ends.

A vehicle (1) is provided and includes a frame (10), a seat (20), front and rear wheel sets (1012, 1014) provided at front and rear ends of the frame, and a handlebar (30). A wheel set is an adjustable wheel set that includes a wheel support (1016), a first wheel (52b) and a second wheel (52c) rotatably supported on the wheel support. The wheel support includes a first connector (60) pivotably mounted to the frame for pivoting movement about a connector axis that lies in a generally vertical-longitudinal plane. The wheel support is pivotable between a first position in which the wheel support holds the first and second wheels canted such that their upper ends are closer together than their lower ends, and a second position in which their upper ends of the first and second wheels are farther from one another than their lower ends.

A bicycle training aid with intelligent controller includes a supporting member attached at one end to a bicycle retractably having a wheel disposed at the other end, an action member attached at one end thereof to the supporting member, a driving mechanism attached to the bicycle and engages the action member to cause a displacement of the action member, a sensor attached to either of the bicycle or a body of a rider, a controller, and communication devices. The intelligent controller is configured to monitor the motion status by the sensor signal, make automatically a decision that an event has occurred when a condition has been satisfied, take a procedure corresponding to an occurrence of the event, where the procedure including either of directing the driving mechanism to cause the displacement, or updating the condition according to an algorithm, and actuate the driving mechanism when directed by the procedure.

A bicycle training aid with intelligent controller includes a supporting member attached at one end to a bicycle retractably having a wheel disposed at the other end, an action member attached at one end thereof to the supporting member, a driving mechanism attached to the bicycle and engages the action member to cause a displacement of the action member, a sensor attached to either of the bicycle or a body of a rider, a controller, and communication devices. The intelligent controller is configured to monitor the motion status by the sensor signal, make automatically a decision that an event has occurred when a condition has been satisfied, take a procedure corresponding to an occurrence of the event, where the procedure including either of directing the driving mechanism to cause the displacement, or updating the condition according to an algorithm, and actuate the driving mechanism when directed by the procedure.

A set of elements giving the possibility of forming two types of wheeled devices for children which comprises: a platform (10), a handle (3) comprising an upright (20) intended to be connected to the front of the platform (10), and a removable seat (6); said handle (3) is removable with respect to the platform (10), and the platform (10) comprises, on the side of the front wheel(s) (11), a well (13) for receiving the lower portion of the upright (20); the platform (10) comprises a front boss (14) and said well (13) opens at the upper portion of this boss (14); the set of elements comprises a body (4) for supporting the seat (6), the front portion (4a) of which has a front extension (22) and a rear extension (23) defining together a housing (24) having a recessed shape corresponding to the shape of the boss (14); the set of elements comprises means (28, 31) for mounting the seat (6) on said supporting body (4), and the set of elements comprises means (5) for attaching at least one of said extensions (22, 23) to the platform (10).

A set of elements giving the possibility of forming two types of wheeled devices for children which comprises: a platform (10), a handle (3) comprising an upright (20) intended to be connected to the front of the platform (10), and a removable seat (6); said handle (3) is removable with respect to the platform (10), and the platform (10) comprises, on the side of the front wheel(s) (11), a well (13) for receiving the lower portion of the upright (20); the platform (10) comprises a front boss (14) and said well (13) opens at the upper portion of this boss (14); the set of elements comprises a body (4) for supporting the seat (6), the front portion (4a) of which has a front extension (22) and a rear extension (23) defining together a housing (24) having a recessed shape corresponding to the shape of the boss (14); the set of elements comprises means (28, 31) for mounting the seat (6) on said supporting body (4), and the set of elements comprises means (5) for attaching at least one of said extensions (22, 23) to the platform (10).

The invention regards a method, a system and a vehicle for analyzing a rider performance. The vehicle is any vehicle that employs a roll angle change for changing its driving direction. Firstly, physical motion parameters of the vehicle in motion are sensed and the measured data is supplied to computing unit. In the computing unit, segments in a time series of measured data are determined by processing the measured data in the computing unit. Each segment corresponds to a rider control behavior and the plurality of such consecutive rider control behavior build a riding maneuver. In the computing unit, the measured data within one segment for at least one of the segments is analyzed by computing at least one characteristic value for the respective segment and/or the sequence of determined segments is analyzed. Finally, an analysis result indicating the rider performance or rider skills is output.

Electronic bicycles may communicate with each other to provide a communal biking experience to their riders. The electronic bicycles may collect rider data about their riders and may adjust the output parameters of the electronic bicycles based on the rider data. For example, the electronic bicycles may identify a weaker rider of the riders and may adjust the output parameters of the weaker rider's electronic bicycle to minimize a difference in the operation of the weaker rider's electronic bicycle and the stronger rider's electronic bicycle. Additionally, a parent rider may establish rider restrictions on an electronic bicycle ridden by a child.