A high performance motorcycle having a frame, engine suspension, and rear wheel drive system that enables rider foot positioning close to the longitudinal centerline of the motorcycle and an overall aerodynamic profile. The engine suspension, centering and damping system allows for lateral movement while damping vibration and unwanted oscillations. The rear wheel drive includes a driven pulley axially disposed on a rear wheel axle, a drive pulley configured to receive motive output from the motorcycle engine, an idler pulley disposed above a line between the axes of rotation of the drive pulley and the rear wheel axle, and a belt or chain disposed around and operatively connecting the drive pulley, the driven pulley and the idler pulley, wherein the idler pulley and the drive pulley configured so as to provide substantially constant tension to a belt or chain over the range of travel of the rear suspension.

One embodiment provides a shock absorber. The shock absorber includes a reservoir communication path through which a damping force generator and a reservoir communicate with each other, a compression-side communication path through which a piston-side oil chamber and the damping force generator communicate with each other, and a compression-side inlet port which is provided in the damping force generator and into which oil flows from the compression-side communication path and which has a compression-side valve that generates damping force. The cross-sectional area of the reservoir communication path is smaller than the cross-sectional area of the compression-side inlet port.

A shock-absorbent structure of an electric carrier is assembled with a steering system. The steering system includes a steering axis and two wheels linked with the steering axis. The shock-absorbent structure of an electric carrier includes a steering assembly and a wheel axle assembly. The steering assembly includes a bushing, a steering connecting portion connected to the bushing, and an accommodating space. The wheel axle assembly includes a body, two axle connecting members respectively disposed at two ends of the body, a body opening penetrating the body, an elastic body disposed between the body and the bushing, and a pressing member passing the body opening. The pressing member abuts at one end of the body corresponding to the bushing when the elastic body is in a diastolic state, and moves away from the bushing when the elastic body is in a compressed state.

A shock-absorbent structure of an electric carrier is assembled with a steering system. The steering system includes a steering axis and two wheels linked with the steering axis. The shock-absorbent structure of an electric carrier includes a steering assembly and a wheel axle assembly. The steering assembly includes a bushing, a steering connecting portion connected to the bushing, and an accommodating space. The wheel axle assembly includes a body, two axle connecting members respectively disposed at two ends of the body, a body opening penetrating the body, an elastic body disposed between the body and the bushing, and a pressing member passing the body opening. The pressing member abuts at one end of the body corresponding to the bushing when the elastic body is in a diastolic state, and moves away from the bushing when the elastic body is in a compressed state.

A bicycle may include a front triangle and a rear suspension system that couples the front triangle to a rear wheel and is dampened by at least one shock absorber. The rear suspension system includes a six-bar linkage having two ternary links separated from each other by one or more binary links, such that the two ternary links do not share a common joint. One of the ternary links may comprise a chain stay. In some examples, the other ternary link may comprise the front triangle. In some examples, the other ternary link may comprise a rocker arm coupling a seat stay link to the shock absorber.

A suspension assembly for a bicycle comprises a lower tubular support configured to be received within a steerer tube of a bicycle fork assembly; an upper tubular support configured to be connected to a stem of a steering assembly above an upper end of the steerer tube; and a spring configured to exert a force that biases the upper and lower tubular supports toward an extended position, wherein the upper and lower tubular supports are configured such that the upper tubular support slides longitudinally relative to the lower tubular support adjacent the stem and above a fork crown of the bicycle fork assembly.

An impact absorbing mechanism for a wheel is provided. The mechanism has discs that are engaged so that rotation of a first disc causes translational movement of a second disc. A restraining member such as a spring acts against translational movement of the second disc to absorb energy from a head on collision or aggressive braking. Once the mechanism is fully activated, teeth on the first and second discs engage to prevent kick back from the restraining member. In some embodiments, a ratchet mechanism is provided to prevent kick back from the restraining member even when the impact absorbing mechanism is not fully activated.

A bicycle may include a front triangle and a rear suspension system that couples the front triangle to a rear wheel and is dampened by at least one shock absorber. The rear suspension system includes a six-bar linkage having two ternary links separated from each other by one or more binary links, such that the two ternary links do not share a common joint. One of the ternary links may comprise a chain stay. In some examples, the other ternary link may comprise the front triangle. In some examples, the other ternary link may comprise a rocker arm coupling a seat stay link to the shock absorber.

A crank assembly for a bicycle includes a crank arm, multiple first and second securing members, and a sprocket unit having small, medium, and large sprockets. The small sprocket includes a toothed ring and multiple first fastening pieces. The medium sprocket includes a toothed ring, multiple second and third fastening pieces, and multiple spacing-adjustment pieces each extending obliquely and interconnecting a respective one of the second fastening pieces and a respective one of the third fastening pieces. The large sprocket includes a toothed ring and multiple fourth fastening pieces. The first securing members secure the small and medium sprockets to the crank arm. The second securing members secure the large sprocket to the medium sprocket.

A bicycle includes a frame, a suspension assembly and a steering assembly. The frame includes a head tube that rotatably receives a front fork assembly. A steerer tube extends axially away from a fork crown of the front fork assembly. The suspension assembly includes an upper tubular support longitudinally slidable relative to a lower tubular support. The upper and lower supports receive a first positive biasing means and a first negative biasing means. The lower and upper supports are respectively connected to the steerer tube and a stem of the steering assembly such that the upper support slides longitudinally relative to the lower support adjacent the stem and above the fork crown.