A system, method, and apparatus for replicating the experience of snow skiing on dry land using a roller land ski with an ability to move and stop consistent with mechanics of an actual snow ski. Each land ski includes a rigid platform with a binding for engagement with a specialized boot, a pair of biased omnidirectional casters supporting said rigid platform, but mounted to a top surface of said platform, and a pair of trucks with a plurality of wheels along its curved axles. A pair of specialized boots constructed out of flexible lightweight material with a stiff support structure to fortify a user's foot and ankle from the forces created by the land ski are included in this system. The method includes calibration and selection of materials for both the board and boot in order to achieve the desired experience.

An adjustable wheel mobility vehicle can have a support structure for supporting a rider, a modular conveying feature with a wheel, and an attachment that physically and tightly secures the modular conveying feature to the support structure in at least two different positions. A tool-free mechanism can allow a user to free the modular conveying feature from the support structure for movement to another position. A system for adjusting a skateboard wheel position can include a wheel support structure having multiple wheel attachment positions, and a wheel assembly comprising a skateboard wheel and a base. The wheel can swivel with respect to the base and the base can join to the wheel support structure. The base and wheel support structure can tightly join to prevent rotation of the base with respect to the wheel support structure and that tightly retain the base in a first attachment position. A release feature can allow a user to easily loosen the base and reposition it in a second attachment position.

Various powered wheeled board vehicles are disclosed. In some embodiments, the vehicle includes a deck having a forward portion and a rearward portion. At least one front wheel can be connected with the deck under the forward portion. The front wheel can be configured to swivel about a first axis and rotate about a second axis. A powered wheel can be connected with the rearward portion. In some configurations, the rear wheel comprises a hub motor.

Various powered wheeled board vehicles are disclosed. In some embodiments, the vehicle includes a deck having a forward portion and a rearward portion. At least one front wheel can be connected with the deck under the forward portion. The front wheel can be configured to swivel about a first axis and rotate about a second axis. A powered wheel can be connected with the rearward portion. In some configurations, the rear wheel comprises a hub motor.

The invention discloses a torque strengthening device for land surfboard adapters, comprising an upper connecting plate and a lower connecting plate, wherein a number of tension springs are connected between the upper connecting plate and the lower connecting plate; the upper connecting plate and the lower connecting plate are provided with the same number of evenly arranged spring connecting blocks on the side facing the tension springs; the number of the tension springs is twice the number of the spring connecting blocks on the upper connecting plate, and each of the spring connecting blocks is provided with two spring connecting holes; the spring connecting blocks of the upper connecting plate and the spring connecting blocks on the lower connecting plate are alternately arranged. The invention can replace tension springs with different torques to obtain different surfing feelings.

A system, method, and apparatus for replicating the experience of snow skiing on dry land using a roller land ski with an ability to move and stop consistent with mechanics of an actual snow ski. Each land ski includes a rigid platform with a binding for engagement with a specialized boot, a pair of biased omnidirectional casters supporting said rigid platform, but mounted to a top surface of said platform, and a pair of trucks with a plurality of wheels along its curved axles. A pair of specialized boots constructed out of flexible lightweight material with a stiff support structure to fortify a user's foot and ankle from the forces created by the land ski are included in this system. The method includes calibration and selection of materials for both the board and boot in order to achieve the desired experience.

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.

Ride-on devices are disclosed. The ride-on device may include a deck having a top surface and a bottom surface and at least two wheels attached to the bottom surface of the deck. The deck includes a bulk flexible material having a first stiffness and at least two resilient members extending in a fore-aft direction and having a second stiffness that is greater than the first stiffness. The bulk flexible material may be a polymer, such as a thermoplastic, and the resilient members may be formed of a fiber composite, such as a fiberglass or carbon composite. The resilient members may be formed integral with the base or may be attached in a separate process. One resilient member may extend along an outer edge on a port side of the deck and another resilient member may extend along an outer edge on a starboard side of the deck.

An electric skateboard with a hinge mechanism includes a first load plate, a second load plate, a hinge mechanism and an electric wire. A first wheel set is installed in the first load plate, and the first load plate includes a first accommodating space. A second wheel set is installed in the second load plate, and the second load plate includes a second accommodating space. A hinge mechanism includes a bridge base and two shaft sleeves pivotally connected at two sides of the bridge base. The bridge base and the two shaft sleeves together form a wiring slot. The two shaft sleeves are fixed to the first load plate and the second load plate respectively, so that the first load plate and the second load plate are foldable toward each other. The electric wire is inserted through the wiring slot.

A four-wheel sensor controlled vehicle having a base and a control box installed with a battery and a control panel; two driving wheels are installed at the bottom surface of the base close to the front edge of the base, and two universal wheels are installed at the bottom surface of the base close to the rear edge of the base. The driving wheel has a hub assembled with a hub motor assembly of a motor. The base is installed with four weighing sensors at four corners, the first weighing sensor and the third weighing sensor respectively correspond to the fore sole and rear sole of the left foot, the second weighing sensor and the fourth weighing sensor respectively correspond to the fore sole and the rear sole of the right foot. The control panel is connected with the motor and the weighing sensors.