According to certain embodiments, a convertible recreational vehicle comprises one or more front ground engaging members; one or more rear ground engaging members; a frame supported by the one or more front ground engaging members and the one or more rear ground engaging members. In addition, the convertible recreational vehicle comprises a steering assembly configured to steer the one or more front ground engaging members. In addition, the convertible recreational vehicle includes a seat assembly supported by the frame and configured to support at least one rider and a motor configured to drive at least one of: (i) the one or more front ground engaging members and (ii) the one or more rear ground engaging members. Further, the convertible recreational vehicle includes a floor panel including a surface that extends across a width of the floor panel.

A bicycle handlebar stem comprising a base (19) designed to be fixedly connected to the steering pivot (8) of a bicycle and a handlebar stem body (9) to which a bicycle handlebar (3) can be fixed. The handlebar stem body (9) can be detachably connected to the base (19) by means of a bayonet fitting. The bayonet fitting makes it possible to connect the handlebar stem body (9) to the base (19) by pushing the handlebar stem body (9) against the base (19), along an engagement axis (A), and then by rotating the handlebar stem body (9) relative to the base (19), about the engagement axis (A).

A drive module for a bicycle according to an aspect of the present invention, the drive module including a bicycle frame comprising a beam insertion hole into which a connecting beam is removably inserted, a main shaft rotatably provided on the bicycle frame, a rear wheel rotatably supported on the bicycle frame and configured to be rotated by rotational force from the main shaft, and a fork rotatably coupled to the bicycle frame.

A stem includes a quill with a quill length extending along an axis. A first quill end has a cradle configured to couple to a handlebar, and a second quill end has helical slots opposite one another. A base has a base length extending along the axis. The base is configured to receive the quill. A first base end has a bracket configured to couple to a steering mast. The base has apertures opposite one another, and a second base end has a groove extending along the axis. A pin is coupled to the base perpendicular to the axis through the apertures. A releasable clamp is sized to fit around a base outer diameter. The helical slots are configured to receive the pin and slidably guide the pin along the helical slots of the quill such that the quill is rotatable within the base and relative to the base.

In an aspect, a compactable bicycle is provided and includes a frame A first frame portion has a steering structure, which has a front wheel. The steering structure further includes a handlebar. A second frame portion has a rear wheel. In a use position the first and second frame portions are unfolded to an unfolded position. In a storage position the first and second frame portions are folded to a folded position, in which the front wheel and the rear wheel are next to each other. The front wheel has a front wheel connector and the rear wheel has a rear wheel connector that is releasably connectable to the front wheel connector to hold the front and rear wheels together.

In an aspect, a compactable bicycle is provided and includes a frame A first frame portion has a steering structure, which has a front wheel. The steering structure further includes a handlebar. A second frame portion has a rear wheel. In a use position the first and second frame portions are unfolded to an unfolded position. In a storage position the first and second frame portions are folded to a folded position, in which the front wheel and the rear wheel are next to each other. The front wheel has a front wheel connector and the rear wheel has a rear wheel connector that is releasably connectable to the front wheel connector to hold the front and rear wheels together.

A bicycle front-end mechanism for quick assembly includes a fork set, a stem set, and a fork bowl set. The stem set is removably mounted around the fork set and includes a stem, a positioning member, a positioning plate, and a connection member. The stem has a first combination bore mounted around the fork set and a second combination bore connected with a handle bar. The positioning member and the positioning plate are coaxially disposed in the first combination bore along the center of the first combination bore by the connection member. A connection tube part has one end engaged with the positioning member. The fork bowl set is removably mounted around the fork set. The engagement of the positioning member and the fork set achieves the efficient assembly of the stem set, the fork bowl set, and the fork set while a guidance effect is provided.

A bicycle front-end mechanism for quick assembly includes a fork set, a stem set, and a fork bowl set. The stem set is removably mounted around the fork set and includes a stem, a positioning member, a positioning plate, and a connection member. The stem has a first combination bore mounted around the fork set and a second combination bore connected with a handle bar. The positioning member and the positioning plate are coaxially disposed in the first combination bore along the center of the first combination bore by the connection member. A connection tube part has one end engaged with the positioning member. The fork bowl set is removably mounted around the fork set. The engagement of the positioning member and the fork set achieves the efficient assembly of the stem set, the fork bowl set, and the fork set while a guidance effect is provided.