Abstract:
A bicycle crank with a core comprised of a durofoam substance, a fiber-reinforced plastic coating encasing the core, a bottom bracket axle fitting arrangement foamed into the core accessible through the fiber-reinforced plastic coating, and a bottom bracket axle fitting arrangement foamed into the core accessible through the fiber-reinforced plastic coating.
Abstract:
The invention relates to a bicycle frame including a base frame and at least one device which is mounted on the base frame, provided in the form of a brace structure, and has an accommodating area for accommodating a wheel. The invention also relates to a bicycle fork and to a method for producing a bicycle frame.
Abstract:
The invention relates to a bicycle frame including a base frame and at least one device which is mounted on the base frame, provided in the form of a brace structure, and has an accommodating area for accommodating a wheel. The invention also relates to a bicycle fork and to a method for producing a bicycle frame.
Abstract:
A bicycle frame with a seat tube, whose upper end is designed to hold a seat pillar and at whose lower end is situated a bottom bracket shell, and to a pair of chainstays, which are essentially parallel to each other and at their front end are pivotally mounted at a first pivot point on the seat tube at a distance from the bottom bracket shell, and at their back end are connected with dropouts to hold a rear wheel axle. The invention also comprises a pair of essentially mutually parallel seatstays, which at one end are pivotally mounted at a second pivot point on the chainstays, this second pivot being situated in the region of the dropouts, and a rocker plate that has three rocker pivot points, that is a first rocker pivot point at which a second end of the seatstays is hinged, a second rocker pivot point at which this rocker plate is rotatably connected to the seat tube, namely in a region between the first pivot point and the upper end of the seat tube, and a third rocker pivot point which is hinged with a first end of a spring suspension device, the second end of which is fixed to the frame.