There is provided a rear cushion device to be mounted between a vehicle main body and a rear suspension arm of a saddle ridden-type vehicle and including a spring and a damper. The damper includes: a cylinder; a piston; a rod; a cylinder-side mounting part; and a rod-side mounting part. The rod-side mounting part includes: a cylindrical inner member fixed to the other axial end side of the rod coaxially with the rod, and having an outer peripheral surface on which a screw is formed; and an outer member mounted to an outer peripheral side of the inner member. The outer member includes: a tubular part having an inner peripheral surface on which a screw to be screwed with the screw of the inner member is formed; and a coupling part for coupling the outer member to the vehicle main body or the rear suspension arm.

There is provided a rear cushion device to be mounted between a vehicle main body and a rear suspension arm of a saddle ridden-type vehicle and including a spring and a damper. The damper includes: a cylinder; a piston; a rod; a cylinder-side mounting part; and a rod-side mounting part. The rod-side mounting part includes: a cylindrical inner member fixed to the other axial end side of the rod coaxially with the rod, and having an outer peripheral surface on which a screw is formed; and an outer member mounted to an outer peripheral side of the inner member. The outer member includes: a tubular part having an inner peripheral surface on which a screw to be screwed with the screw of the inner member is formed; and a coupling part for coupling the outer member to the vehicle main body or the rear suspension arm.

A joint assembly including a housing including an inner diameter portion having a tapered surface; and at least one shaft having an outer diameter portion having a tapered surface that is complementary in shape to the inner diameter portion of the housing, where the shaft is adapted to rotate relative to the housing, and where the frictional fit is adjustable by modifying the axial position of the shaft relative to the housing.

A joint assembly including a housing including an inner diameter portion having a tapered surface; and at least one shaft having an outer diameter portion having a tapered surface that is complementary in shape to the inner diameter portion of the housing, where the shaft is adapted to rotate relative to the housing, and where the frictional fit is adjustable by modifying the axial position of the shaft relative to the housing.

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 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 rear triangle of a tubular bicycle frame, which comprises a tubular structure which defines at least one head tube for connection to a front fork, a first horizontal tubular body, which is connected to the head tube and defines an inlet for mounting a saddle post, and a second, oblique tubular body and a third, vertical tubular body.

The rear triangle is composed of a first half-triangle and a second half-triangle, each one composed of a pair of horizontal chain stays which at one end are rigidly connected to a pair of distinct oblique seat stays so as to define, for each one of said pairs of horizontal chain stays and oblique seat stays, a V-shape.

The upper and lower free ends of the pairs of horizontal chain stays and oblique seat stays are articulated to third tubular body so that they can oscillate.

A rear triangle of a tubular bicycle frame, which comprises a tubular structure which defines at least one head tube for connection to a front fork, a first horizontal tubular body, which is connected to the head tube and defines an inlet for mounting a saddle post, and a second, oblique tubular body and a third, vertical tubular body.

The rear triangle is composed of a first half-triangle and a second half-triangle, each one composed of a pair of horizontal chain stays which at one end are rigidly connected to a pair of distinct oblique seat stays so as to define, for each one of said pairs of horizontal chain stays and oblique seat stays, a V-shape.

The upper and lower free ends of the pairs of horizontal chain stays and oblique seat stays are articulated to third tubular body so that they can oscillate.

A swing arm structure for a saddle riding vehicle including: a pivot section swingably supported by a vehicle body frame of the saddle riding vehicle; an arm section extending from the pivot section toward a rear side of a vehicle body of the saddle riding vehicle and configured to support an axle of a rear wheel of the saddle riding vehicle at a rear section; and a first reinforcement section formed of a carbon fiber reinforced resin in which carbon fibers are oriented uniformly in a vehicle body forward/rearward direction, wherein the first reinforcement section is installed on a lower surface of the arm section.

A swing arm structure for a saddle riding vehicle including: a pivot section swingably supported by a vehicle body frame of the saddle riding vehicle; an arm section extending from the pivot section toward a rear side of a vehicle body of the saddle riding vehicle and configured to support an axle of a rear wheel of the saddle riding vehicle at a rear section; and a first reinforcement section formed of a carbon fiber reinforced resin in which carbon fibers are oriented uniformly in a vehicle body forward/rearward direction, wherein the first reinforcement section is installed on a lower surface of the arm section.