The invention relates to a handlebar stem, which permits simple and quick loosening and twisting, as well as simple and safe resetting and fastening of said stem with the handlebar attached thereto. The problem of the invention is to provide a particularly simple, theft-proof and versatile alternative involving low manufacturing costs, and which can also easily be retrofitted. A stem set according to the invention comprises a stem and at least one locking device, which can be fixedly clamped to the steerer tube. According to the invention, the stem set is arranged, such that when mounted on the steerer tube, the locking device fixedly connected to the steerer tube prevents the stem from being pulled off the steerer tube. However, this can also be achieved, for example, by the stem engaging around and/or behind the locking device and/or the locking device engaging around and/or behind the stem.

A steering linkage assembly that allows an offset between a steering axis and a headtube axis of a bicycle. In turn, rider cockpit dimensions are divorced from vehicle performance aspects such that vehicle performance aspects may be tailored regardless of rider size. The steering linkage assembly generally includes linkage members on an opposite side of a linkage chassis than handlebars of the bicycle to improve performance by increasing steering angle range allowed by the linkage. In addition, different linkage members and linkage chasses may be provided to accommodate different offsets between the steering axis and the headtube axis.

A steering linkage assembly that allows an offset between a steering axis and a headtube axis of a bicycle. In turn, rider cockpit dimensions are divorced from vehicle performance aspects such that vehicle performance aspects may be tailored regardless of rider size. The steering linkage assembly generally includes linkage members on an opposite side of a linkage chassis than handlebars of the bicycle to improve performance by increasing steering angle range allowed by the linkage. In addition, different linkage members and linkage chasses may be provided to accommodate different offsets between the steering axis and the headtube axis.

A tilt-decoupled steering device of a motorbike includes a handlebar bridge for receiving a motorbike handlebar, a fork bridge for receiving a fork leg, and at least one decoupling device connecting the handlebar bridge to the fork bridge. The handlebar bridge is mounted such that it can rotate about a steering axis and is secured about a tilt axis orthogonal to the steering axis, and the fork bridge is mounted such that it can rotate about the steering axis and about the tilt axis. The decoupling device transfers a steering movement and a steering torque in a steering direction about the steering axis between the handlebar bridge and the fork bridge, and compensates for a tilting movement in a tilting direction about the tilt axis of the fork bridge relative to the handlebar bridge.

A stem for a bicycle includes first and second components. The first component includes first upper and lower fixed seats, which are connected by a first connecting part. The second component includes second upper and lower fixed seats, which are connected by a second connecting part, and the second connecting part intersects with the first connecting part. Two first screws pass through the first upper fixed seat and the second lower fixed seat and screw with two screw holes on one side of the mounting base of the bicycle front fork. Two second screws pass through the second upper fixed seat and the first lower fixed seat and screw with two screw holes on another side of the mounting base of the bicycle front fork. Thus, the bicycle handle bar achieves good controllability and stability, and the stem has advantages of a simple structure, light weight and quickly assembly.

A stem for a bicycle includes first and second components. The first component includes first upper and lower fixed seats, which are connected by a first connecting part. The second component includes second upper and lower fixed seats, which are connected by a second connecting part, and the second connecting part intersects with the first connecting part. Two first screws pass through the first upper fixed seat and the second lower fixed seat and screw with two screw holes on one side of the mounting base of the bicycle front fork. Two second screws pass through the second upper fixed seat and the first lower fixed seat and screw with two screw holes on another side of the mounting base of the bicycle front fork. Thus, the bicycle handle bar achieves good controllability and stability, and the stem has advantages of a simple structure, light weight and quickly assembly.

A motorcycle includes: a front swing arm that includes upper arms and lower arms; a fork holder; a front fork; and a front cushion unit. The fork holder of a front-wheel suspension device includes a pair of left and right sideward extended portions which extend in the vehicle width direction. The front ends of the left and right upper arms are attached to the left and right sideward extended portions though connecting shafts, respectively.

A three-dimensional folding frame is disclosed including a first pivot portion for providing a front folding wheel frame with movable folding; a second pivot portion for providing a rear folding wheel frame with movable folding; a third pivot portion for providing a handlebar vertical rod with rotatable folding; and a fourth pivot portion for providing a crossbar with rotatable folding. The crossbar includes a first folding arm and a second folding arm; the first folding arm is movably connected to the front folding wheel frame by means of the first pivot portion; the front folding wheel frame rotates about the first pivot portion and can move relative to the first folding arm; the second folding arm is movably connected to the rear folding wheel frame by means of the second pivot portion.

A luggage scooter has a middle frame, a front wheel section, a seat section, and a rear wheel section. The front wheel section has a front wheel frame pivotally connected to the middle frame at a front wheel frame joint. The front wheel frame is mounted to a steering joint. The steering joint is mounted on the middle frame. The steering joint provides steering in both a left and right direction. The front wheel frame joint provides the front wheel frame with configurable position between a stowed position and a deployed position. A front wheel is mounted to the front wheel frame at a front wheel support. A rear wheel section has a rear wheel frame pivotally connected to the middle frame at a rear wheel frame joint.

A luggage scooter has a middle frame, a front wheel section, a seat section, and a rear wheel section. The front wheel section has a front wheel frame pivotally connected to the middle frame at a front wheel frame joint. The front wheel frame is mounted to a steering joint. The steering joint is mounted on the middle frame. The steering joint provides steering in both a left and right direction. The front wheel frame joint provides the front wheel frame with configurable position between a stowed position and a deployed position. A front wheel is mounted to the front wheel frame at a front wheel support. A rear wheel section has a rear wheel frame pivotally connected to the middle frame at a rear wheel frame joint.