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.

A caster board can include a front platform, a rear platform, and at least two neck sections extending between the front platform and the rear platform. The neck sections can serve as a torsion element allowing twisting of the front platform relative to the rear platform. An aperture between the neck sections can be configured to receive an insert. The insert can alter a structural characteristic of the caster board, such as the torsional stiffness of the caster board.

A velocity sport boot system/velocity sport board for performing all-weather snowboarding activity. The velocity sport boot/board system includes a velocity sport boot assembly that provides a method of practicing snowboarding on a treadmill. The velocity sport boot assembly includes a boot liner, a boot body, and a plurality of ball bearing assemblies. The plurality of ball bearing assemblies further includes shock absorbing springs for user comfort on varying surfaces. An alternative embodiment of the velocity sport boot/board system uses a common snowboarding type boot affixed to a sport board assembly that includes a sport board base, coupling straps, and a plurality of ball bearing assemblies.

A velocity sport boot system/velocity sport board for performing all-weather snowboarding activity. The velocity sport boot/board system includes a velocity sport boot assembly that provides a method of practicing snowboarding on a treadmill. The velocity sport boot assembly includes a boot liner, a boot body, and a plurality of ball bearing assemblies. The plurality of ball bearing assemblies further includes shock absorbing springs for user comfort on varying surfaces. An alternative embodiment of the velocity sport boot/board system uses a common snowboarding type boot affixed to a sport board assembly that includes a sport board base, coupling straps, and a plurality of ball bearing assemblies.

The present steerable wheel assembly incorporates a lean-to-steer mechanism into an inner race of a roller bearing, while a wheel is mounted to an outer race of the roller bearing. A shaft extending from the mechanism is attached to a body, and the mechanism acts to steer the outer race and the wheel about a vertical steering axis when the shaft is tilted about a horizontal axis. The mechanism can be a pivot joint, providing a linear steering response, or can be a lean-to-steer mechanism that provides a non-linear response where the steering action is not proportionally responsive to tilting over the expected range of tilting.

A wheel core assembly for a recreational device such as a skateboard is provided. The orientation of the wheel core assembly can be readily reversed to allow use of both sides of a wheel such as e.g., a side-set wheel. The position of an outer bearing and a spacer can be readily switched to either side of an internal chamber thereby allowing the user to select the orientation of the wheel on an axle. The outer bearing and spacer can be configured for ready removal and installation without the use of special purpose tools.

An electric weight sensing skateboard using one or more strain gauge systems to detect rider-induced strain on one or both trucks, an inertial sensor to detect accelerations and balance position, and wheel speed sensors. Throttle is controlled by rider position, for example, lean forward to increase speed, lean back to slow down. Several drive methods include a driver position detection velocity setpoint control, torque setpoint control, and direct velocity/torque control. A throttle remote is note required. Rider weight activates the motors.

Quick release systems and methods are provided which may be used with a skate assembly comprising a boot, a soul plate, and a grind plate. A first component, which may be a soul plate, has a tab and slot engagement mechanism. A second component, which may be a grind plate, defines at least one aperture and is engaged with at least a portion of the first component. At least one push button is accessible via the at least one aperture. When the second component is in an inward position it maintains the tab and slot engagement mechanism in a locked position and when the second component is in an outward position it unlocks the tab and slot engagement mechanism. When the push button is not pressed, it maintains the second component in the inward position and when the push button is pressed it facilitates movement of the second component to the outward position.

A wearable motorized device comprising a shoe bracket, which can be fastened to a shoe; wheels that are installed on the left and right sides of the shoe bracket in parallel to support the wearer's lateral skating and longitudinal walking; a driving motor for rotationally driving the wheels; and a battery pack for powering the driving motor. The wheels are not coaxially installed on the two sides of the shoe bracket to drive the wearer's longitudinal skating, but instead are installed on the two sides of the shoe bracket in parallel to drive the wearer's lateral skating; the wearer can position his/her legs apart during skating, so the skating stability is improved. Its general contour does not significantly exceed the contour of the shoe in the longitudinal direction, thus and it will not strain the wearer when ascending or descending stairs.

A functional shoe includes a sole, a functional part to provide a specific function to the functional shoe, a fixing part provided to fix the functional part; and a coupling part provided to be coupled to the fixing part, and directly or indirectly coupled to the sole, at an opposite side to a side coupled to the fixing part. The fixing part includes a fixing body provided to be coupled to the functional part, and a leg member formed to extend from the fixing body in a reference direction which is a direction facing the sole from the fixing body. The coupling part includes an insertion slot provided inside the coupling part to be open in a direction opposite to the reference direction such that the leg member is inserted into the insertion slot.