Articulated two-wheeled vehicles have front and rear frame sub-assemblies connected together by an articulated frame joint configured to enable directional and angled counter-action of front and rear wheels or skis.

Articulated two-wheeled vehicles have front and rear frame sub-assemblies connected together by an articulated frame joint configured to enable directional and angled counter-action of front and rear wheels or skis.

An apparatus including a bicycle frame including a drive side chain stay. The drive side chain stay can include a drive side chain stay chamber, an inside chain stay cutout, an outside chain stay cutout; and a dropout. The drive side chain stay can be configured such that a chain of a bicycle including the bicycle frame can be inserted through the inside chain stay cutout, the drive side chain stay chamber, and the outside chain stay cutout without breaking the chain.

Articulated two-wheeled vehicles have front and rear frame sub-assemblies connected together by an articulated frame joint configured to enable directional and angled counter-action of front and rear wheels or skis.

The invention relates to a bicycle (100) having a frame structure (200) that comprises a swingarm structure (225) including a first substantially U-shaped sheet metal part for holding a wheel (103), the frame structure further comprising a frame bridge (219) consisting of a second substantially U-shaped sheet metal part. The first U-shaped sheet metal part is bent substantially in a first bending plane (P) to form a first U-shape, and the second U-shaped sheet metal part is bent in a second bending plane (Q) to form substantially a second U-shape. The first bending plane extends substantially perpendicular to the second bending plane.

The described bicycle has a frame made of a composite material and defining a monocoque shell which is monolithic, entirely formed of the composite material, and includes: a rear upper portion, a head tube portion, and a rear mounting portion; and first and second side panels each extending between, and integrally formed with, at least the head tube portion at a forward end and the rear upper portion and the rear mounting portion at a rearward end. The first and second side panels are integrally interconnected along their respective top and bottom edges to form a substantially hollow shell structure at least partially enclosing a shell cavity defined between the laterally spaced apart first and second side panels. The hollow shell structure defines a rear opening between the rear upper portion and the rear mounting portion that communicates with the shell cavity.

The described bicycle has a frame made of a composite material and defining a monocoque shell which is monolithic, entirely formed of the composite material, and includes: a rear upper portion, a head tube portion, and a rear mounting portion; and first and second side panels each extending between, and integrally formed with, at least the head tube portion at a forward end and the rear upper portion and the rear mounting portion at a rearward end. The first and second side panels are integrally interconnected along their respective top and bottom edges to form a substantially hollow shell structure at least partially enclosing a shell cavity defined between the laterally spaced apart first and second side panels. The hollow shell structure defines a rear opening between the rear upper portion and the rear mounting portion that communicates with the shell cavity.

A combination driving hub and transmission for a cyclesuch as a bicycle. The inventive hub is preferably installed on the rear of a bicycle. A pair of reciprocating cranks provide input torque to corresponding input shafts. These input shaft transmit the torque through a series of step-up shafts. The step-up shafts increase the speed of the initial inputfinally delivering the torque to an output shaft. The output shaft is preferably the hub of the bicycle's rear wheel.

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.