The present invention relates to a straddle-type vehicle provided with: a front wheel; a rear wheel; an electrical component box that houses a battery; electrical components such as a relay connected to the battery; and electrical component attachment parts with which the electrical components are attached to the electrical component box, wherein the electrical component box is made of a resin, and at least a bank angle sensor is housed in the electrical component box.

A bicycle including a handlebar attached to a frame at substantially a midpoint and a seat post, a plurality of light sources normally disposed to project light in either of a first, second or third forward direction, said plurality of light sources controlled by a microcomputer which employs a sensor to monitor the immediate position of either the handlebar with respect to the frame or the orientation of the bicycle with respect to the horizontal, and which selects the appropriate light source to be illuminated to project light in the most preferred direction to illuminate the anticipated path of the bicycle to improve visibility and safety during operation, particularly under low ambient light conditions, and wherein the microcomputer activates one or more front or rear turn signals, and brake lights in response to movement of the bicycle, handlebars or a manual signal.

Aspects of the subject technology relate to communication device used as a power meter. The communication device includes circuitry to determine values of several forces and a processor. The processor determines a combined force by combining the determined values of the forces. The processor further determines a value of a power based on the s combined force, a speed and a loss factor. The communication device is used by a user to measure the power. The power is generated by the user when engaged in an activity, and the forces affect a movement of the user.

Aspects of the subject technology relate to communication device used as a power meter. The communication device includes circuitry to determine values of several forces and a processor. The processor determines a combined force by combining the determined values of the forces. The processor further determines a value of a power based on the s combined force, a speed and a loss factor. The communication device is used by a user to measure the power. The power is generated by the user when engaged in an activity, and the forces affect a movement of the user.

Provided is an electric power-assist device which can be used to retrofit and convert an existing bicycle to a power assisted bicycle with ease, and enables proper power assist control in response to the pedaling force, without major modifications to the bicycle. The device comprises an electric motor 58 connected to a crankshaft 24 or a crankarm 28 of a bicycle 10; a rotational angle sensor 130 for detecting a crank rotational angle of the crankshaft; an acceleration sensor 134 for detecting an acceleration level in a traveling direction of the bicycle; and a control unit 150 for controlling the electric motor 58, wherein the control unit comprises: a pedaling force estimator 152 for estimating a pedaling force based on an acceleration level measured at a predetermined crank rotational angle; and a motor drive controller 158 for controlling the electric motor 58 based on the estimated pedaling force.

A human-powered vehicle control device is configured to automatically control a suspension and an adjustable seatpost to a suitable state. The human-powered vehicle control device includes an electronic controller configured to control at least one of the suspension and the adjustable seatpost mounted to the human-powered vehicle upon detection of an inclined state of the human-powered vehicle based on a change in pressure of at least one tire of the human-powered vehicle. The pressure of the at least one tire is detected by a pressure detector configured to detect pressure of the at least one tire of the human-powered vehicle.

A human-powered vehicle control device is configured to automatically control a suspension and an adjustable seatpost to a suitable state. The human-powered vehicle control device includes an electronic controller configured to control at least one of the suspension and the adjustable seatpost mounted to the human-powered vehicle upon detection of an inclined state of the human-powered vehicle based on a change in pressure of at least one tire of the human-powered vehicle. The pressure of the at least one tire is detected by a pressure detector configured to detect pressure of the at least one tire of the human-powered vehicle.

A human-powered vehicle control device is configured to control a derailleur in a suitable state. The human-powered vehicle control device includes an electronic controller configured to control a derailleur mounted to a human-powered vehicle based on a change in pressure of a tire detected by a pressure detector detecting the pressure of at least one tire of the human-powered vehicle.

A human-powered vehicle control device is configured to control a derailleur in a suitable state. The human-powered vehicle control device includes an electronic controller configured to control a derailleur mounted to a human-powered vehicle based on a change in pressure of a tire detected by a pressure detector detecting the pressure of at least one tire of the human-powered vehicle.

A vehicle includes a body having a first part and a second part, which is moveably coupled to the first part. The vehicle further includes a pedal assembly having a first component coupled to the first part and a wheel assembly having a second component coupled to the second part. The vehicle further includes an extendable drive shaft having a first member and a second member. The first member is coupled to the first component and the second member is coupled to the second component. The vehicle further includes a locking mechanism having a locking member coupled to the first part and the second part of the body. The locking member, in an unlocked position, unlocks the second part from the first part to allow the second part to move over the first part, which may cause a change in a length of the extendable drive shaft.