A wheel rim structure includes an integral frame body. The frame body has two side walls, a bottom wall, and a connecting rib. The bottom wall is integrally connected between bottom edges of the two side walls. The connecting rib is integrally connected between the two side walls and has a predetermined distance from the bottom wall. Inner wall surfaces of the side walls, the bottom wall and the connecting rib are formed with a plurality of crests arranged at intervals and a plurality of troughs each connected between every adjacent two of the crests. Outer wall surfaces of the side walls and the bottom wall are formed with a plurality of crests arranged at intervals and a plurality of troughs each connected between every adjacent two of the crests. The crests and the troughs form a continuous corrugated surface, which can withstand greater stress without causing surface wrinkles.

A method for manufacturing a one-piece wheel by forging includes: producing an integral forging comprising: a disc portion, a rim portion, and an annular protrusion protruding from one side of the disc portion in a forging method; producing an outer bend by bending the annular protrusion through a flow-forming process; and forming a hollow portion by welding one end of the outer bend to one side of the rim portion. The method manufactures the one-piece wheel having stronger shear strength and stiffness and better fatigue life even while reducing the noise using the forging method.

A connection stabilizing mechanism between a solid tire and a bicycle rim. The connection stabilizing mechanism includes multiple fastening members connecting a solid tire with a bicycle rim. Each of the fastening members has a plate-shaped base section engaged with the bicycle rim and an extension section inserted into the solid tire. A free end of the extension section is inserted into the solid tire. A ratio of an extension length of the extension sect ion to a tire height of the solid tire is between 1:1.5 and 1:2.6, thereby maintaining a relative position of the center of a main body of the solid tire relative to the rim. Thus, the solid tire is prevented from being detached from the rim due to excessive lateral movement of the central position of the main body of the solid tire.

A rim for a bicycle wheel includes a radially outer tire-engaging portion, a first sidewall, and a second sidewall spaced apart from the first sidewall. The first and second sidewalls may extend radially inward of the radially outer tire-engaging portion. The rim includes a radially inner portion having at least one asymmetric protrusion.

A bicycle wheel has a wheel frame. The wheel frame is a hollow and annular frame and is composited by multiple equally sized wheel bars. Each one of the wheel bars has two halves connected to each other to form the wheel bar, and each one of the two halves being made by laminating, heating and forming a thermoplastic prepreg. The equally sized wheel bars are connected to each other to form the bicycle wheel.

A process for manufacturing a spoked bicycle wheel, comprising the steps of providing a rim element having a spoke attachment chamber; providing a spoke attachment assembly for coupling to a respective spoke, inserting the spoke attachment assembly through an opening of the spoke attachment chamber along an insertion direction that is inclined with respect to the rim element and moving the spoke attachment assembly along the insertion direction until a stem of the spoke attachment assembly is at the surface of the spoke attachment chamber; moving the spoke attachment assembly along the surface of the spoke attachment chamber towards a spoke attachment seats; inserting the stem in the spoke attachment seat; and, constraining the spoke attachment assembly in the spoke attachment seat. The steps are repeated to couple a respective spoke attachment assembly to each of the plurality of spoke attachment seats. The invention also relates to a spoked bicycle wheel produced by the above process.

A bicycle rim is configured to reduce drag as well as enhance steering stability, such as in gusty and/or high cross wind conditions. The rim includes a leading edge where the rim interfaces with a tire, and a sidewall extends from the leading edge. The rim includes a spoke face where one or more spokes extend from the bicycle rim. A reflexed blend portion is disposed between the sidewall and the spoke face. The reflexed blend portion allows the sidewall to have increased camber which lowers pressure drag. At the same time, the reflexed blend portion allows the spoke face to have a larger radius so as to provide greater steering stability, such as in gusty and/or high cross wind conditions.

A vehicle wheel including a rim, a hub, and a plurality of spokes extending with a span portion between the rim hub. The rim and/or hub constitutes a bracing element. A connecting element is connected to the bracing element and includes an external surface, an internal cavity. A spoke has a longitudinal axis and an external spoke surface that that overlaps the internal cavity in an overlap region, and a pre-formed lateral spoke surface. The connecting element is crimped to create a crimped joinder with the spoke such that the connector surface is pressed and plastically deformed to displace the internal cavity toward the spoke surface in the overlap region to cause a lateral connector surface to laterally overlap the lateral spoke surface to create an overlie engagement and/or to increase a lateral overlap between a lateral connector surface and the lateral spoke surface in an overlie engagement. The overlie engagement supports spoke tensile load.

A bicycle disc or spider wheel including: a hub; a rim having a radially outer tire-coupling region, a first sidewall, a second sidewall; an axis of rotation; and a median plane. A pair of pretensioned disc or spider wheel-type structural elements are integral with the hub and with the rim. The first sidewall extends on a first side of the wheel, with respect to the median plane, on which a component of a motion transmission system or, when there is none, a disc of a disc brake is provided at the hub, and the second sidewall extends on the opposite side, with respect to the median plane. The first sidewall of the rim has a minimum distance from the median plane that is smaller than that of the second sidewall of the rim.

A rim (5) for a bicycle wheel having a body (20) with a substantially annular extension with a radially outer portion (22) shaped for coupling with a tire is disclosed. The radially outer portion (22) has a hole (39) for an inflation valve. The radially outer portion (22) also includes, at the hole (39) and/or in an area proximal to the hole (39), at least one cross section having a different shape from that at an area distal from the hole, so as to form at least one second surface discontinuity (35) along the annular extension of the radially outer portion (22). The second discontinuity (35) makes it easier to assemble to wheel and allows an optimal coupling to be made between the rim (5), inflation valve, and tire, in the case of a tubeless wheel, and between rim (5), air chamber and tire, in the case of a wheel with an air chamber.