A stem that can be folded laterally instantaneously about a vertical or near-vertical axis for a bicycle that allows storage/transportation/parking and constituting an anti-theft system. The width of the bicycle is minimized at the handlebar and optionally makes it un-rideable. The foldable stem, supporting a handlebar, that instantaneously folds the handlebar along the bicycle, and is optionally ergonomically adjustable. The foldable stem includes a stem body secured in a hyperstatic manner by an optionally quick-release tightener to a steering pivot. The stem body directly or indirectly supporting at least one substantially vertical rotation bearing on which the stem arm can oscillate. The handlebar stem simplifies and optionally protects the storage, transport and parking of the bicycle.

Presented herein is a foldable bicycle (folding bike) with improvement including a step-through or low step-over electric bicycle (eBike, pedelec) with a main frame member or members extending rearward from the head tube to a hinge and a bottom bracket where a mid-drive motor may be positioned, and wherein at least one battery is mounted to the frame, and wherein the hinge is located near the midpoint of the bicycle and allows the front frame assembly and the rear frame assembly to pivot laterally around the hinge in a manner moving generally parallel to the ground to a folded position. Other improvements presented herein include a foldable bicycle, electric, or non-electric, with a handlebar and stem which are moveable to a steering assembly storage position, and in the storage position the handlebar and/or stem serve to fasten the foldable bicycle in the folded position. The folded bicycle may be rolled along the ground in the folded position.

A rotatable folding bicycle stem includes a stem rotatably mounted on the standpipe with defining a stem rotating axis. An upper end of the stem terminates in a forwardly projecting O-shaped loop. A distance between the stem rotating axis to a center of the O-shaped loop is smaller than a distance between the standpipe rotating axis to the center of the O-shaped loop. A space between the handlebar and the frame could be reduced or became smaller by utilizing the present invention. The smaller folded size of the folding bicycle facilitates storage by users and is beneficial in that the bicycle may be stacked or compacted more tightly when loading in a cargo car of a container for delivery, thereby reducing a shipping cost for a single bike and increasing a loading quantity in single container.

A stem includes a stem body, a column and a locking device. The stem body is provided with a perforation. The column is disposed at one end of the stem body and provided with a first aperture, the perforation is communicated with the first aperture. The locking device is disposed in the perforation and includes a clamping part, two sliding blocks and a first fixing member, the clamping part is located between the sliding blocks, and the first fixing member penetrates the clamping part and the sliding blocks. When the first fixing member moves toward inside of the perforation, the first fixing member drives the sliding blocks to approach each other and squeeze the clamping part, such that the clamping part moves in a direction toward the first aperture. According to this, the assembly and disassembly procedures of the present invention are quite simple and easy to operate.

A handlebar stem system for bicycle handlebars includes a steerer tube and a handlebar stem tube. The handlebar stem tube protrudes into the steerer tube. By means of a clamping device arranged within the steerer tube, is it possible to clampingly connect handlebar stem tube and steerer tube. According to the disclosure, the clamping device includes a clamping means, such as a screw, which protrudes into the steerer tube through an insertion opening therethrough.

An assembly for a bicycle including a steerer tube configured for insertion in a head tube of a bicycle, the steerer tube comprising a lower portion for securement to a bicycle fork and an elongated upper portion having a noncircular cross-section, and a coupler for engaging the steerer tube with a handlebar stem of the bicycle. The coupler further including an expansion plug having a bolt threadably engaged to a lower wedge such that rotation of the bolt provides longitudinal translation of the lower wedge, the lower wedge having a plurality of angled lower wedge sliding surfaces, a headset top cap threadably securable to the bolt, an upper wedge having a plurality of angled upper wedge sliding surfaces and a bolt aperture, a plurality of side wedges, and a flexible fastener positioned around the plurality of side wedges to compress the plurality of side wedges inward towards the bolt.

An assembly for a bicycle including a steerer tube configured for insertion in a head tube of a bicycle, the steerer tube comprising a lower portion for securement to a bicycle fork and an elongated upper portion having a noncircular cross-section, and a coupler for engaging the steerer tube with a handlebar stem of the bicycle. The coupler further including an expansion plug having a bolt threadably engaged to a lower wedge such that rotation of the bolt provides longitudinal translation of the lower wedge, the lower wedge having a plurality of angled lower wedge sliding surfaces, a headset top cap threadably securable to the bolt, an upper wedge having a plurality of angled upper wedge sliding surfaces and a bolt aperture, a plurality of side wedges, and a flexible fastener positioned around the plurality of side wedges to compress the plurality of side wedges inward towards the bolt.

A lockable steering mechanism for a children's ride-on vehicle is provided. The steering mechanism has a steering shaft coupled to a steering link that is coupled to the vehicle's front wheels. A steering wheel is axially fixed to the steering shaft. A lifter guide is rotationally and axially fixed to the steering shaft, and a lifter is rotationally fixed to and axially moveable about the lifter guide. A rotatable locking ring rotates from a first position to a second position. The lifter engages the steering wheel when the locking ring is in the first position to rotationally fix the steering wheel to the steering shaft. The lifter is rotationally decoupled from the steering wheel when the locking ring is in a second position to rotationally decouple the steering wheel from the steering shaft.

A handlebar stem system for bicycle handlebars includes a steerer tube and a handlebar stem tube. The handlebar stem tube protrudes into the steerer tube. By means of a clamping device arranged within the steerer tube, is it possible to clampingly connect handlebar stem tube and steerer tube. According to the disclosure, the clamping device includes a clamping means, such as a screw, which protrudes into the steerer tube through an insertion opening therethrough.

A multipiece handlebar assembly, method of assembly and kit are disclosed. The multipiece handlebar assembly, method and kit includes a first handlebar section having a first grip end spaced apart from a first handlebar mounting end and a second handlebar section having a second grip end spaced apart from a second handlebar mounting end. An interjoining feature is at the first and second handlebar mounting ends, wherein the interjoining feature on the first handlebar mounting end is removably secured to the interjoining feature on the second handlebar mounting end. At least one removably secured attachment feature is secured through the interjoining feature.