A notification system notifies brake-related information related to braking of a rotation body of a human-powered vehicle. The notification system includes a notification unit that includes a notification device configured to notify a user of the brake-related information. The notification device is provided on at least one of a brake device braking the rotation body, an operation device operating the brake device, and a display device.

A notification system notifies brake-related information related to braking of a rotation body of a human-powered vehicle. The notification system includes a notification unit that includes a notification device configured to notify a user of the brake-related information. The notification device is provided on at least one of a brake device braking the rotation body, an operation device operating the brake device, and a display device.

Systems, devices, and methods for a scooter (100) having a front portion (108) and a deck (116) for a user to stand on; and a three-dimensional character (110) disposed on the front portion of the scooter, where the three-dimensional character creates a perspective of riding on or in the three-dimensional character for the user on the deck.

Systems, devices, and methods for a scooter (100) having a front portion (108) and a deck (116) for a user to stand on; and a three-dimensional character (110) disposed on the front portion of the scooter, where the three-dimensional character creates a perspective of riding on or in the three-dimensional character for the user on the deck.

A skateboard or longboard truck having configured to couple with a deck of the skateboard or longboard. The truck including a base and a hanger. The hanger disposed within a hanger aperture of the base. The hanger rotatably coupled with the base by a pivot assembly. The rotation of the hanger with respect to the base controlled by a compression assembly.

A bicycle display device is configured to show an image on a display that is appropriate to a bicycle component, which is communicable with the bicycle display device. The bicycle display device is configured to be mounted on a bicycle. The bicycle display device includes a communication unit, a display and an electronic controller. The communication unit is communicably connected to a bicycle component that is mounted on the bicycle and configured to be actuated in multiple actuation modes. The display is configured to show an image related to the actuation modes of the bicycle component, which is one of different types of bicycle components. The electronic controller changes the image shown on the display in accordance with the type of the bicycle component communicably connected to the communication unit.

A notification system notifies brake-related information related to braking of a rotation body of a human-powered vehicle. The notification system includes a notification unit that includes a notification device configured to notify a user of the brake-related information. The notification device is provided on at least one of a brake device braking the rotation body, an operation device operating the brake device, and a display device.

A skateboard deck that is both stiff in one dimension and flexible in another dimension is disclosed. The deck includes an elongated body characterized by a longitudinal axis, a plurality of ribs, and a plurality of apertures. The plurality of ribs are long, narrow beams oriented substantially parallel to the longitudinal axis and integral with the bottom of the elongated body. The plurality of apertures are distributed in a plurality of rows also oriented substantially parallel to the longitudinal axis. The ribs and rows of apertures are interposed in an alternating pattern across the width of the deck. The resulting deck is stiff in the longitudinal direction yet flexible with respect to rotation about the longitudinal axis. The deck is therefore flexible enough to enable the front and rear trucks to rotate with respect to one another while still being rigid enough to withstand the weight of the rider.

A bicycle chain comprises a first outer link plate. The first outer link plate comprises a first outer-link end portion, a second outer-link end portion, a first outer-link intermediate portion, and a first outer-link longitudinal centerline. The first outer-link end portion, the second outer-link end portion and the first outer-link intermediate portion define a first outer-link outer peripheral edge. The first outer-link outer peripheral edge comprises a first outer-link end edge, a second outer-link end edge, and a pair of first outer-link intermediate edges. A first radial distance is defined from a first outer-link center axis to the first outer-link end edge in a perpendicular direction. A minimum distance is defined between the pair of first outer-link intermediate edges in the perpendicular direction. The minimum distance is smaller than 200% of the first radial distance and is equal to or larger than 5 mm.

Disclosed is a rotation transmission mechanism including: an internal rotation member inserted by a crankshaft of a bicycle; and an external rotation member configured on the internal rotation member. The internal rotation member includes: an internal rotation member body. The external rotation member includes: a circular ring part configured at an outer side of the outer circumferential convex parts; and inner circumferential convex parts protruding to an inner circumferential side of the circular ring part and configured alternately with the outer circumferential convex parts. Elastic deformation parts are configured between the outer circumferential convex parts and the inner circumferential convex parts on a rotation direction side of the advancing outer circumferential convex parts. The outer circumferential convex parts are formed in such a manner that a surface on the rotation direction side is greater than a surface on an opposite side of the rotation direction.