A bicycle rim assembly includes a rim defining a central plane and comprising annular inner and outer walls. The outer wall includes first and second bead seats separated by a center well. First and second annular projections are spaced laterally from each other relative to the central plane and extend substantially radially outwardly from the outer wall. Each of the annular projections includes a radially outer face and a laterally inner face. Right and left covers are spaced from each other and are preferably coupled to the rim to cover at least a portion of the laterally inner face and the radially outer face of the first and second annular projections, respectively, and also the first and second bead seats, respectively. One or both of the right and left covers can be fiber reinforced. First and second pieces of tape can be overlapped and used to secure the covers to the rim.

A structure of a bicycle wheel rim is disclosed. It comprises an inner rim frame and a composite rim body. The inner rim frame is provided with an inner rim part, two lateral ring parts respectively disposed on both sides of the inner rim part, two hooks respectively disposed on terminals of the two lateral ring parts, and an opening formed between the two hooks and having a supporting part. The composite rim body encapsulates the inner rim part, the two lateral rings and the two hooks.

A two-piece wheel may have a first section and a second section. The wheel has areas of varying diameter across its width, and the first second and the second section are joined at the area of the wheel with the smallest diameter. The first section can be a spoke section with spokes extending from the central hub and the second section can be a barrel section.

A bicycle sprocket assembly comprises a plurality of sprockets and a first support element. The plurality of sprockets is arranged coaxially about a rotational center axis of the bicycle sprocket assembly. The plurality of sprockets includes a first sprocket. The first sprocket includes a first toothed ring and a first sprocket body at least partly disposed radially inwardly of the first toothed ring with respect to the rotational center axis. The first toothed ring is made of a first material. The first sprocket body is made of a second material that is different from the first material. The first support element extends from the first sprocket to a second sprocket adjacent to the first sprocket in an axial direction with respect to the rotational center axis. The first support element is made of a first additional material that is different from the second material.

The present invention provides a bicycle rim assembly adapted to be coupled to a hub to create a bicycle wheel. The rim assembly includes a rim and a cover coupled to the rim. The rim defines a central plane and comprises an annular inner wall and an annular outer wall cooperating with the inner wall to define a cavity. The rim further includes annular projections spaced laterally relative to the central plane and extending substantially radially outwardly from the outer annular wall. The cover includes sidewalls disposed on lateral sides of the rim adjacent the projections, each sidewall including a lateral inner portion having a lateral thickness. The cover further includes an annular ring portion interconnecting the sidewalls, the annular ring portion including a radial thickness less than the lateral thickness of the lateral inner portion of the sidewalls. Preferably, the rim comprises a metallic material and the cover comprises a non-metallic material. For example, the rim can comprise aluminum or an epoxy matrix composite, and the cover can comprises a polymeric material, such as ultra-high molecular weight polyethylene. In addition, a radial thickness of the entire cover is preferably substantially less than a radial thickness of the entire rim. In one embodiment, the projections include a laterally inwardly facing surface, a laterally outwardly facing surface, and a radially outwardly facing surface. In this embodiment, the cover engages at least a portion of each of the laterally inwardly facing surface, the laterally outwardly facing surface, and the radially outwardly facing surface. Preferably, each annular projection has a smoothly radiused radially outwardly facing surface, and each laterally outwardly facing surface that lies in a radial plane substantially parallel to the central plane.

A bicycle disc wheel comprises a first disc panel and a second disc panel. The first disc panel has a first side outer surface and a first side inner surface and the second disc panel has a second side outer surface and a second side inner surface. The first side outer surface radially extends from a first disc panel outer perimeter to a center opening and the second side outer surface radially extends from a second disc panel outer perimeter to the center opening. The second side inner surface faces the first side inner surface. A brace is coupled to the first side inner surface and the second side inner surface that provide radial and axial structural support to the disc panels.

A center-lock attachment arrangement for use in attaching a composite wheel to a mount. TA front element includes an outer engagement surface engaging a center-lock fastening nut and an inner engagement surface engaging an outer side of a central attachment area of the composite wheel. The front element further includes an attachment aperture through which a center-lock fastener is inserted and a plurality of fastener apertures around the attachment. A backing element includes an outer engagement surface facing the mount and an inner engagement surface engaging with an inner side of the central attachment area. The backing element further includes an attachment aperture through which the center-lock fastener is inserted and a plurality of fastener apertures around the attachment aperture. Elongate fasteners received through the aligned apertures of the front and the backing element clamp the front and the backing element over and around the central attachment area.

A rim assembly for a non-pneumatic tire has at least two rim components including: a first rim component having a first rim flange and a first lip, and a second rim component having a second rim flange and a second lip. The rim assembly further includes a plurality of lateral rim component support structures configured to extend through a plurality of openings of a tire support structure. The rim assembly also includes a first plurality of fasteners securing the plurality of lateral rim component support structures to the first rim flange, and a second plurality of fasteners securing the plurality of lateral rim component support structures to the second rim flange.

A bicycle rim includes a radially outer peripheral part, a radially inner peripheral part, at least one first slanting member, and at least one intermediate member. The at least one first slanting member radially extends between the radially outer peripheral part and the radially inner peripheral part in a first direction slanted with respect to a radial direction of the bicycle rim as viewed in an axial direction of the bicycle rim. The at least one intermediate member is disposed between the radially outer peripheral part and the radially inner peripheral part.

A method for making a carbon fiber wheel rim includes: preparing an outer supporting piece; winding a carbon-fiber yarn around the outer supporting piece to form carbon fiber layers and to constitute an engaging seat preform; connecting an inner supporting piece to the engaging seat preform; connecting a reinforcement piece to the inner supporting piece; winding a carbon-fiber yarn around an assembly of the engaging seat preform, the inner supporting piece and the reinforcement piece to form carbon fiber layers; fixing the assembly with the carbon fiber layers to form an outer frame preform; and cutting the outer frame preform and the engaging seat preform to form a trench and removing the outer supporting piece therefrom.