A wheel disc includes a hub located centrally within the wheel disc and defining a wheel axis. The wheel disc further includes an outer circumferential edge and a transition portion radially extending between the hub and the outer circumferential edge. The transition portion has a front surface and a rear surface such that the rear surface has a relatively smooth profile and the front surface has a plurality of concentric ring-shaped curvatures formed therein, thereby providing the transition portion with a variable thickness between the front and rear surfaces.

A wheel rim assembly includes a rim defining a rim opening, a wheel disk disposed in the rim opening, a plurality of first fastening members fastening the wheel disk to the rim, and a plurality of second fastening members. The wheel disk includes a center disk defining a center bore that is coaxial with the rim, and a plurality of spokes interconnecting the center disk and the rim. The first fastening members fasten the spokes to the rim such that removal of the first fastening member permits separation of the spoke from the rim. The second fastening members fasten the spokes to the center disk such that removal of the second fastening member permits separation of the spoke from the center disk.

A wheel rim assembly includes a rim defining a rim opening, a wheel disk disposed in the rim opening, a plurality of first fastening members fastening the wheel disk to the rim, and a plurality of second fastening members. The wheel disk includes a center disk defining a center bore that is coaxial with the rim, and a plurality of spokes interconnecting the center disk and the rim. The first fastening members fasten the spokes to the rim such that removal of the first fastening member permits separation of the spoke from the rim. The second fastening members fasten the spokes to the center disk such that removal of the second fastening member permits separation of the spoke from the center disk.

A wheel disc including a bolt hole for bolt fastening, includes a first region extending to have a predetermined width in a circumferential direction of the bolt hole and a second region, other than the first region, wherein the first region has an average tensile strength lower than that of the second region.

A composite wheel assembly and method of construction thereof is provided. The composite wheel assembly includes a lightweight annular aluminum barrel having an inner surface and an outer surface configured to support a tire thereon. A lightweight metal central hub assembly is fixed to the barrel. The metal central hub assembly includes a central hub portion and plurality of support spokes extending outwardly from the central hub portion to free ends, wherein the free ends are fixed to the inner surface of the aluminum barrel. A wheel cladding contrasting in at least one of material type, color, texture and surface finish to an outwardly facing surface the central hub assembly is fixed to the outwardly facing surface of the central hub assembly.

An axle-free wheel comprising: an outer rim member having a ground interface on an external surface thereof and an outer ball race or rolling race on an inner surface thereof; an inner rim member having an inner ball or rolling race on an outer surface thereof.

A composite wheel assembly and method of fabricating the same is provided. The wheel assembly includes a composite wheel rim, a wheel center, and a plurality of attachment fasteners for attaching the wheel center to the wheel rim. The wheel rim includes a plurality of attachment inserts that are configured to selectively engage with respective attachment fasteners. Each attachment insert is encapsulated by a plurality of composite layers of the wheel rim or is otherwise secured to the wheel rim. The attachment inserts extend from and/or are positioned within a drop well region of the wheel rim. The method of fabricating the wheel assembly includes forming first and second preforms and positioning the same onto a mold assembly. The method further includes positioning the attachment inserts between the first and second preforms such that the attachment inserts are secured therebetween.

Provided is a wheel (6a) in which a disk (62) includes a first rib (62a) extending in a radial direction, and protruding out on one side in a direction of a central axis a1. A hub (61) of the wheel (6a) includes a first blade portion (61d1) extending in the radial direction. At least one of a pair of side surfaces of the first rib (62a) is inclined relative to a plane including the central axis a1 of the disk (62), and the first blade portion (61d1) is fixed to the inclined side surface on one side of the central axis a1.

Provided is a wheel (6a) in which a disk (62) includes a first rib (62a) extending in a radial direction, and protruding out on one side in a direction of a central axis a1. A hub (61) of the wheel (6a) includes a first blade portion (61d1) extending in the radial direction. At least one of a pair of side surfaces of the first rib (62a) is inclined relative to a plane including the central axis a1 of the disk (62), and the first blade portion (61d1) is fixed to the inclined side surface on one side of the central axis a1.

A vehicle wheel disc includes a flat plate-shaped hub-mounted part, a cylindrical rim-mounted part, and a hat-shaped part. The hat-shaped part includes a hat top portion, a hat inner peripheral portion, and a hat outer peripheral portion. At a border between the hub-mounted part and the hat inner peripheral portion, a first connecting portion is provided, and at a border between the hat top portion and the hat outer peripheral portion, a second connecting portion is provided. The plate thickness of the hat outer peripheral portion is smaller than the plate thickness of an intermediate portion that is a portion from a border between the first connecting portion and the hat inner peripheral portion to a border between the hat top portion and the second connecting portion in the disc radial direction.