A wheel for a skateboard may include a bearing assembly, an annular rim coupled to and extending annularly around the bearing assembly, and a tapered tire portion coupled to and extending annularly around the annular rim. A dual wheel assembly may include a first wheel disposed on a longitudinal end portion of an axle, a spacer disposed on the longitudinal end portion of the axle adjacent to the first wheel and abutting against the first wheel, and a second wheel disposed on the longitudinal end portion of the axle adjacent to the spacer and abutting against the spacer. A method of making a dual wheel assembly may include disposing a first wheel on an axle, disposing a spacer on the axle adjacent to the first wheel, and disposing a second wheel on the axle adjacent to the spacer.

A wheeled ski is disclosed that may include a flexible member. The wheeled ski may also include a first wheel assembly that includes a first wheel with a first-wheel first rotational axis and a first-wheel second rotational axis. The first-wheel first rotational axis and the second-wheel second rotational axis may intersect. The wheeled ski may also include a second wheel assembly that includes a second wheel with a second-wheel first rotational axis and a second-wheel second rotational axis. The second-wheel first rotational axis and the second-wheel second rotational axis may intersect. The first wheel assembly may further include a first axle coupled with the flexible member and a first rod that extends through the first axle. The second wheel assembly may further include a second axle coupled with the flexible member and a second rod that extends through the second axle.

A skateboard with a removable hub that can be attached and detached from a wheel of a skateboard, comprising a skateboard deck rollably supported by one or more wheels and attached to the wheels via one or more trucks, with each hub removably attached to the wheel with a key.

A personal vehicle system including a deck having a substantially flat top surface, where the top surface is substantially flat and is of sufficient area to support two feet of a user, a truck coupled to the deck, where the truck consist of a first portion coupled to the deck and a second portion that tilts relative to the first portion, and a wheel motor coupled to the second portion of the truck. A personal vehicle system that includes a deck, a truck coupled to the deck, and a wheel motor coupled to the truck, where the wheel motor has a passive cooling system. The passive cooling system includes at least one endcap that rotates about a wheel rotation axis during operation of the wheel motor and the endcap has at least one fin.

An apparatus comprising a platform; a plurality of trucks coupled to the platform; and a roller assembly coupled to the platform, wherein the roller assembly is configured for an omnidirectional rotation, wherein the roller assembly is configured for an elastic biasing, wherein the roller assembly is driven by a motor.

An electric vehicle may comprise a board including first and second deck portions each configured to receive a left or right foot of a ride, a wheel assembly disposed between the deck portions and including a ground-contacting element, a motor assembly mounted to the board and configured to rotate the ground-contacting element around an axle to propel the electric vehicle, at least one sensor configured to measure orientation information of the board, and a motor controller configured to receive orientation information measured by the sensor and to cause the motor assembly to propel the electric vehicle based on the orientation information. The electric vehicle may include exactly one ground-contacting element, and the motor may be a hub motor.

A parkour wheeled boot for increasing moving speed, having self-balancing function, wearable on a respective leg of a user. Each boot has a wearing mechanism, a shock reduction mechanism, a drive mechanism, a motion transmission mechanism, a power mechanism and a control mechanism. The wearable mechanism has a pedal, a pedal fixation rack, calf supporting plates, and magnetic pieces or belt and buckle. The shock reduction mechanism has a spring seat, springs and a cover. The drive mechanism has a motor having a hollowed center, and also an inner wall of a bearing. The motion transmission mechanism has an outer wall of the bearing, a wheel hub, and a rubber tire. The power mechanism has batteries, battery smart protection control board, ports and connection wires. The control mechanism is a single board unit with microprocessor, angular speed sensor, acceleration sensor, pressure sensor and relevant electronic components.

A wearable device configured to selectively provide roller transportation, the wearable device including a shoe, a plurality of wheel assemblies, each wheel assembly being configured to selectively roll relative to a ground surface about an associated axis of rotation, and a frame connected between the wheel assemblies, the frame comprising a trunk and a plurality of branches extending from the trunk, each of the branches being configured for connection to at least one of the plurality of wheel assemblies, wherein at least a portion of the shoe is located vertically higher than at least a portion of the frame when at least one of the wheel assemblies is in contact with the ground surface and the at least one of the wheel assemblies is positioned to selectively roll relative to the ground surface.

Mechanism for easy and safe installation, locking and removal of the wheels on the footwear, belongs to the area of objects for personal use or leisure, characteristic in appearance and use. They can be used as roller skates and also for walking. The mechanism is installed in the supports, and consists of an elastic ball that is inserted into the holes made in the supports. The ball has the function of a spring. The sleeve is firmly tied in the holes of the support by means of a pin. The axle on which the wheels are slidably and rotatably mounted is inserted into the sleeve. With the help of the projection on the axles and the flat seat, under the action of the force from the elastic ball, the wheels are firmly and separable attached to the sole of the footwear.

The invention discloses a wheel structure and a scooter comprising the wheel structure. The wheel structure comprises: an inner rim having a first inner annular face and a first outer annular face that are arranged radially, the first inner annular face is hollow and provided with an interface for connecting to a steering mechanism of the scooter; an outer rim having a second inner annular face which is arranged radially and a second outer annular face for contacting the ground; wherein an intermediate connecting assembly is disposed between the first outer annular face of the inner rim and the second inner annular face of the outer rim, and the outer rim, without need for hub, contacts the inner rim in a rolling manner via the intermediate connecting assembly and is rotatable relative to the inner rim. The wheel structure does not contain a hub and presents a hollow visual effect of the wheel.