A bicycle includes a front wheel and a rear wheel and a frameset supported on the front wheel and the rear wheel. The frameset includes a main frame and a front fork rotationally coupled to the main frame. The main frame includes a top tube, a head tube rotationally supporting the front fork, a down tube coupling the head tube to a bottom bracket, a seat tube extending downward from the top tube and including a lower end spaced from the bottom bracket, a seatstay extending rearward from the lower end of the seat tube, and a strut member extending forward from the lower end of the seat tube and connecting the seat tube to the down tube.

A rear wheel suspension system for a bike includes a seat tube, a bottom bracket shell, left and right side flexible chainstays and a right side flexible chainstay, left and right side seatstays, and a set of dropouts located where the flexible chainstays and the seatstays interconnect for rotably supporting the rear wheel of the bicycle. The leaf spring is connected to the upper end area of the seatstays, and extends downwardly from its point of connection to the upper end area of the seatstays to a point of connection to the seat tube of the bicycle. The leaf spring is arranged at a distance D to the seat tube in a direction perpendicular to the top and bottom surfaces of the leaf spring to allow flex of the leaf spring towards the seat tube and thus vertical flex of the flexible chainstays.

The present invention relates to a vehicle body for a two-wheeled vehicle, the vehicle body having excellent shock-absorbing performance and enabling structure simplification since both a front wheel frame and a rear wheel frame can rotate with respect to a saddle frame so that shock is absorbed at both a front wheel and a rear wheel, even if shock is applied to either the front wheel or the rear wheel. The vehicle body for a two-wheeled vehicle comprises: a rotary frame comprising a saddle frame having a saddle mounted on the top thereof, a front wheel frame connected to a front wheel shaft, and a rear wheel frame connected to a rear wheel shaft, which are rotatably coupled to each other through a rotary support part; and a shock absorber which is provided between the saddle frame, the front wheel frame and the rear wheel frame, and which elastically supports, with respect to the saddle frame, the front wheel frame and the rear wheel frame that rotate upward toward the saddle frame around the rotary support part.

The present invention relates to a vehicle body for a two-wheeled vehicle, the vehicle body having excellent shock-absorbing performance and enabling structure simplification since both a front wheel frame and a rear wheel frame can rotate with respect to a saddle frame so that shock is absorbed at both a front wheel and a rear wheel, even if shock is applied to either the front wheel or the rear wheel. The vehicle body for a two-wheeled vehicle comprises: a rotary frame comprising a saddle frame having a saddle mounted on the top thereof, a front wheel frame connected to a front wheel shaft, and a rear wheel frame connected to a rear wheel shaft, which are rotatably coupled to each other through a rotary support part; and a shock absorber which is provided between the saddle frame, the front wheel frame and the rear wheel frame, and which elastically supports, with respect to the saddle frame, the front wheel frame and the rear wheel frame that rotate upward toward the saddle frame around the rotary support part.

The present invention allows a user to ride a bicycle while lying with his/her face down, thereby lowering the center of weight and improving the driving stability, increasing the velocity by reducing the air resistance during driving, and increasing the generation of thrust by easily transferring the force of the user to pedals, and comprises: a frame provided with a front wheel and a rear wheel such that the user can ride while lying with his/her face down; and an acceleration means installed on the rear wheel and generating power and acceleration according to pedaling.

The present invention allows a user to ride a bicycle while lying with his/her face down, thereby lowering the center of weight and improving the driving stability, increasing the velocity by reducing the air resistance during driving, and increasing the generation of thrust by easily transferring the force of the user to pedals, and comprises: a frame provided with a front wheel and a rear wheel such that the user can ride while lying with his/her face down; and an acceleration means installed on the rear wheel and generating power and acceleration according to pedaling.

A foldable top tube assembly for a bicycle is provided. The assembly includes a seat post attachment terminus coupled to a first telescoping tubular member, and a headset assembly attachment terminus coupled to a second telescoping tubular member. The overall length of the folded top tube assembly may be about ⅓ the overall length of the fully extended top tube assembly. The assembly further includes a central, hinged tubular member having a first end sized to receive the first telescoping tubular member, and a second end sized to receive the second telescoping tubular member. The assembly may also include a first spring tending to resist extension of the first telescoping tubular member from the first end of the central, hinged tubular member, and a second spring tending to resist extension of the second telescoping tubular member from the second end of the central, hinged tubular member.

A bicycle frame is discussed having a battery fully contained within a down tube of the bicycle frame. The battery may be inserted into or removed from the down tube via a through opening through a bottom bracket housing of the bicycle frame. Weakness in the bottom bracket housing due to the through opening may be compensated for, fully or partially, by utilizing a bottom bracket bearing assembly that has a structural component, or structural component assembly, that extends completely through the bottom bracket housing and removably couples to the bottom bracket housing.

A method for forming a bicycle frame assembly having a number of elongate tubes is disclosed. A two part mold can be used to form a hollow finish part as part of the assembly. The assembly includes a passage that is defined by the elongate member, a partition, and a bridge. The partition isolates the passage from an interior volume of the elongate tube. The bridge extends in a direction normal to an elongate direction of the passage and defines an inlet and an outlet of the passage. The inlet, outlet, and bridge are generally flush with an exterior surface of the elongate tube and provide a passage that cooperates with a flexible connector, such as a cable tie, for securing supplemental structures, such as brake and shift control cables, to the elongate tube of the bicycle frame assembly.

A method for forming a bicycle frame assembly having a number of elongate tubes is disclosed. A two part mold can be used to form a hollow finish part as part of the assembly. The assembly includes a passage that is defined by the elongate member, a partition, and a bridge. The partition isolates the passage from an interior volume of the elongate tube. The bridge extends in a direction normal to an elongate direction of the passage and defines an inlet and an outlet of the passage. The inlet, outlet, and bridge are generally flush with an exterior surface of the elongate tube and provide a passage that cooperates with a flexible connector, such as a cable tie, for securing supplemental structures, such as brake and shift control cables, to the elongate tube of the bicycle frame assembly.