Embodiments disclosed herein include an electric assist bicycle adapted for a both personal and public use, and subcomponents of the bicycle. The electric assist bicycle can include a hollow frame with one or more cables routed within the hollow frame. The hollow frame can be configured with an internal battery compartment. The electric assist bicycle can further include a modular electronic locking system.

An article made by composite material includes a body made of reinforced fiber. The body has at least two opposing sidewalls. A foam component is embeddedly disposed in each sidewall. Owing to the two foam components, the finished composite structure is lightweight and has high mechanical strength.

An article made by composite material includes a body made of reinforced fiber. The body has at least two opposing sidewalls. A foam component is embeddedly disposed in each sidewall. Owing to the two foam components, the finished composite structure is lightweight and has high mechanical strength.

A drive device according to an embodiment of the present technology includes a generation unit; a wheel unit; and a cover unit. The generation unit generates a rotational force. The generated rotational force is transmitted to the wheel unit, and the wheel unit rotates about a predetermined axis. The cover unit includes a base portion connected to the wheel unit, and a rib portion that is formed of a material different from that of the base portion and reinforces the base portion, and forms a space that houses the generation unit.

A saddle-riding-vehicle front part structure includes: a suspension that is arranged at a rearward position of a steering shaft and at an upward position of a power source; a support shaft that supports the suspension and that is provided between a pair of right and left arms; and a cover that is provided between the steering shaft and the suspension and that covers a space between the pair of right and left arms, wherein the cover includes a pair of right and left first cover parts that correspond to the pair of right and left arms and a second cover part that corresponds to the suspension, and the pair of right and left first cover parts and the second cover part are displaceable independently from each other.

A saddle-riding-vehicle front part structure includes: a suspension that is arranged at a rearward position of a steering shaft and at an upward position of a power source; a support shaft that supports the suspension and that is provided between a pair of right and left arms; and a cover that is provided between the steering shaft and the suspension and that covers a space between the pair of right and left arms, wherein the cover includes a pair of right and left first cover parts that correspond to the pair of right and left arms and a second cover part that corresponds to the suspension, and the pair of right and left first cover parts and the second cover part are displaceable independently from each other.

The present invention relates to a bicycle with connector function and at least a number of subsystems. The bicycle includes a tube assembly including a frame with mutually fixed tube elements and movable tube elements, such as a steering pin and a handlebar, at least a first bicycle cassette, for holding at least a first of the number of subsystems, such as a bicycle control unit, of the bicycle for providing a respective function to the bicycle. The first bicycle cassette is arrangeable in at least a first tube element of the tube assembly, and includes a first cassette contact, including a number of contact poles, that is connectable with the at least first of the number of subsystems internal in the first bicycle cassette. A bicycle also includes a connector for connecting with the first cassette contact of the first bicycle cassette. The bicycle connector includes a first connector contact, including a number of contact poles, for connecting with the first cassette contact, and at least one output contact for connecting with a respective subsystem. The bicycle connector is arrangeable in the respective first tube element of the tube assembly.

A bicycle includes a frame having cross sectional profiles. The profiles are designed according to certain criteria to enhance bicycle performance. The profiles for multiple frame members may each fall within a range for each of aspect ratio, circumference, drag coefficient, first moment of inertia and/or second moment of inertia.

A bicycle includes a frame having cross sectional profiles. The profiles are designed according to certain criteria to enhance bicycle performance. The profiles for multiple frame members may each fall within a range for each of aspect ratio, circumference, drag coefficient, first moment of inertia and/or second moment of inertia.

In the vicinity of a front end of a plate-shaped member of a fiber reinforced resin material having long fibers, to suppress deterioration in strength due to waviness of the long fibers during press-molding. The plate-shaped member is formed by a discontinuous fiber reinforced resin having long fibers. A flat surface part of the plate-shaped member is provided with a hole part, and a side wall is integrally formed to a semicircular end of the flat surface part located closer to the hole part. The side wall is arranged in a region between an opening edge of the hole part closer to a front end, and the front end so as to extend around its outer circumference.