A process for manufacturing a bicycle wheel component, comprising the steps of providing a component having at least one braking area that cooperates with a braking body made by molding of composite material having structural fibers in a polymeric material, and post-molding machining of at least one region of the braking area by removing only polymeric material, without removal of the structural fiber, from the entire region so that the structural fiber outcrops at least in part from the polymeric material, and removing the structural fiber and possibly the polymeric material according to at least one groove within the region. A bicycle wheel component having a braking area of composite material, wherein in a region of the braking area, the structural fiber outcrops at least from the polymeric material, and the region comprises a groove through the structural fiber and possibly the polymeric material of the composite material.

A cushion connecting rod of a saddled vehicle is configured in such a manner that an initial failure condition can be visually recognized in combination with fiber composite material and metal without using a special adhesive. A cushion connecting rod as a long member applied with a load when a swing arm is swung against a springing force of a rear cushion is configured in such a manner that a part of a surface of a metallic member is covered with an endless fiber-reinforced plastic. The fiber-reinforced plastic adheres to the surface of the metallic member with a film adhesive. Supporting portions applied with the load are provided at both ends in a longitudinal direction of the metallic member. A recessed portion and a plurality of lightening holes are formed between the supporting portions at both the ends, the recessed portion being configured in such a manner that a thickness dimension of the metallic member is set to be smaller than a thickness dimension of the supporting portions. The fiber-reinforced plastic covers surfaces of the supporting portions and the recessed portion.

A hub for a bicycle wheel includes a hub shell that defines one or more spoke holes. The hub shell includes a fiber reinforced material. The fiber reinforced material has one or more reinforcement fibers bending around the spoke holes to remain continuous around the spoke holes. One or more flanges with the spoke holes extend from the hub shell at an outer radial direction. A clutch or freehub adapter is coupled to the hub shell. Depending on the type of clutch mechanism used in the freehub, different clutch adapters can be incorporated into the hub.

A component comprises a hollow component having a plurality of prepreg layers, where each prepreg layer includes a graphene-resin mixture comprising a resin and a graphene preparation evenly disposed throughout the resin. The component further includes a fiber cloth impregnated with the graphene-resin mixture. The plurality of prepreg layers are applied and pressed together in alternate layers of graphene-resin mixture and fiber cloth to form the hollow component.

A process includes disposing a mandrel assembly within a mold cavity bounded by mold forming surfaces. The mold is closed, first portions of the mandrel assembly seal against mold forming surfaces, and a continuous volume shaped as a node element is defined between second portions of the mandrel and the mold forming surfaces. A composite material is injected into the mold cavity filling the continuous volume, and cured forming the node element. The mandrel assembly is removed in sections exposing a node element opening. Tube-skeletons are inserted one each into openings of the node element, each tube-skeleton comprises foam core supported glass or carbon fabric materials. A resin material is injected into the mold cavity, such that the resin material permeates through the fabric material into a node element interior via the openings. The injected resin material is cured, thereby forming tube elements joined to the node element.

A wheel component, method, and tool device for a bicycle, including a plurality of integrally interconnected component parts, which form a spoked rim, wherein the rim and spokes are manufactured of a fibrous composite material by an injection molding process with fluid injection, wherein the liquefied fibrous composite material is injected into a cavity of a tool device, and a fluid is injected into the partially liquid fibrous composite material within the cavity to form at least one hollow space within the component part. A further component part forming a spoke, is manufactured by an injection molding process, wherein a mold core device for forming a hollow space within the spoke is disposed within a further cavity of the tool device. The fibrous composite material is injected into the further cavity. The mold core device is retracted from the fibrous composite material to form a cavity in the spoke.

Proposed are a carbon frame and a method of manufacturing the same capable of improving torsional stiffness. The method includes the steps of: (a) preparing at least two forms; (b) wrapping up the forms with vinyl sheets; (c) laminating carbon prepregs on the vinyl sheets; (d) combining the forms to put the combined forms in a mold; and (e) injecting heat and wind into the vinyl sheets.

A bicycle component includes a composite laminate. The composite laminate includes a hollow container made of a first polymer-based material, a layer of a second polymer-based material disposed on the hollow container, and a layer of a composite material disposed on the layer of the second polymer-based material. The bicycle component also includes a water soluble core material disposed within hollow container. The water soluble core material is dissolvable and removable from the composite laminate after lamination of the composite laminate

A crank arm for a bicycle may include a body extending along a body axis and having a first body end and a second body end axially spaced apart from the first body end. The insert may also include an insert provided toward the first body end. The insert may include a base portion having a radially outer surface. At least one extension may extend outwardly from the radially outer surface and may be encased within a corresponding recess in the body whereby relative planar movement between the body and the at least one extension in a first plane. The retaining portion may have a retaining portion width measured in the first direction and the retaining width may be greater than the throat width thereby inhibiting relative radial movement between the at least one extension and the recess and preventing radial extraction of the extension from the corresponding recess.

A bicycle rim for bicycles with a rim body with a visible surface perceptible in proper operation, wherein a supporting structure of the rim body is made from fibrous composite materials of prepreg layers is disclosed. The rim body includes rim flanks disposed opposite one another, a rim well, and a rim base. The visible surface is formed by a thin non-woven layer on the supporting structure, so as to form directly during manufacturing, an optically appealing, visible surface on the rim body, involving no postprocessing. The non-woven layer forms on the rim body, an outer layer of a composite layer. The composite layer includes a prepreg layer and the non-woven layer.