Brake calipers and rotors for bicycles are described herein. An example brake caliper includes an outboard caliper portion to be disposed inboard of a frame of the bicycle. The outboard caliper portion includes an outboard caliper body and an outboard brake pad that is fixed relative to the outboard caliper body. The brake caliper also includes an inboard caliper portion coupled to the outboard caliper body. The inboard caliper portion is disposed inboard of the outboard caliper portion when the brake caliper is coupled to the bicycle. The inboard caliper portion includes an inboard caliper body and an inboard brake pad that is movable relative to the inboard caliper body.

Brake rotors for bicycles are described herein. An example brake rotor for a bicycle includes a carrier to be coupled to a hub of the bicycle. The brake rotor also includes a brake track having braking surfaces to be engaged by brake pads. The brake track is disposed radially outward of the carrier. The brake track has a first thickness and the carrier has a second thickness greater than the first thickness. The brake track is coupled to the carrier such that the brake track is axially movable relative to the carrier while being radially and circumferentially constrained relative to the carrier.

The present disclosure relates to the location of a disc brake caliper mounted to a trailing-link suspension fork. In one aspect, the disc brake caliper is attached to a sprung portion of the fork, hence adding zero mass and corresponding inertia to the un-sprung portion of the suspension system. Further, the disc brake caliper is positioned forward of the wheel axle and linkage member.

A hydraulic device comprises a base member, a piston, a seal ring, and an intermediate member. The base member includes a cylinder bore and an annular groove. The annular groove includes a first inner surface and a second inner surface. The piston is movable relative to the base member from a rest position toward an actuated position in a second direction opposite to a first direction. The piston is movable relative to the base member from the actuated position toward the rest position in the first direction. The seal ring includes a first axial surface facing in the first direction and a second axial surface facing in the second direction. The seal ring is provided in the annular groove so as to define a clearance between the first axial surface and the first inner surface. The intermediate member is provided in the clearance.

The present disclosure relates to the positioning of a disc brake caliper mounted to a rigid bicycle fork. In one aspect, the disc brake caliper is attached to a portion in front of the fork and the front wheel axle, hence exposing the disc brake caliper to the maximum cooling potential of the airflow. Further, the disc brake caliper is positioned roughly horizontally in-line with the wheel axle to provide aerodynamic benefits for the trailing front wheel axle.

A brake disc includes an outer circumferential portion including a waveform portion having recessed portions and projecting portions repeatedly formed over an outer circumference, and for the outer circumferential portion to have substantially uniform heat capacity distribution in a circumferential direction and in a radial direction, the outer circumferential portion is formed such that a ratio of a difference in heat capacities among a plurality of circumferential sections in the outer circumferential portion, which are sectioned at an equal angle in the circumferential direction, relative to a heat capacity of each circumferential section is equal to or less than a first predetermined ratio. A ratio of a difference in heat capacities among radial sections in the outer circumferential portion, which are sectioned to have an equal length in the radial direction, relative to a heat capacity of each radial section is equal to or less than a second predetermined ratio.

In an electric drive device for a bicycle, there is an electric motor with an output shaft and an angular gear by which the output shaft is connectable to a wheel of the bicycle in a drive-effective manner, and a fastening device is provided, carrying the electric motor and configured to fasten the electric motor to a rotation axle of the wheel.

A hydraulic braking system for a bicycle may include a hydraulic control device that is configured with multiple timing ports positioned within a stroke of a piston of the hydraulic control device. The multiple timing ports are located at different positions along an operational and/or axial length of a cylinder of the hydraulic control device.

A rear brake assembly of a kick scooter includes a brake including an attaching member having an open end; and a visual warning device being a module and fastened in the attaching member by snapping. Also, the fastening of the visual warning device in the attaching member is done manually.

A wheel component with a fixing ring for attaching a brake disk to a hub shell of a bicycle hub, and with a securing unit for securing the fixing ring, wherein the ring includes a radially-extending fixing unit, and a threaded axially-extending tube unit, to screw the thread of the threaded tube unit on the hub shell, and to attach the brake disk to a hub. The fixing unit includes at least one axial through hole which is configured such that the through hole is at least in partial axial alignment with an axial cavity in the brake disk in the mounted state of the fixing ring, so that the securing arm of the securing unit is insertable into the cavity of the brake disk through the through hole in the fixing unit, so that the securing arm locks the fixing ring to prevent inadvertent detachment of the fixing ring.