The invention provides a rim for a braked aircraft wheel, the rim comprising an outer circular portion (103) terminated at its ends by flanges (106a, 106b) for receiving a tire, the outer circular portion being connected by a wheel disk (105) to a hub (104) for fitting on an undercarriage axle in order to rotate about an axis of rotation coinciding with a central axis (X) of the rim, the rim being designed to receive a tire on the outside of the outer circular portion and a brake on the inside, on one side of the wheel disk. According to the invention, the outer circular portion (103a) on the side of the wheel disk that is to receive a brake presents, in a plane containing the central axis of the wheel, a profile that has two slopes ?, ? relative to a direction parallel to the central axis on going from the wheel disk to the corresponding flange, and flaring towards the flange.

The invention provides a rim for a braked aircraft wheel, the rim comprising an outer circular portion (103) terminated at its ends by flanges (106a, 106b) for receiving a tire, the outer circular portion being connected by a wheel disk (105) to a hub (104) for fitting on an undercarriage axle in order to rotate about an axis of rotation coinciding with a central axis (X) of the rim, the rim being designed to receive a tire on the outside of the outer circular portion and a brake on the inside, on one side of the wheel disk. According to the invention, the outer circular portion (103a) on the side of the wheel disk that is to receive a brake presents, in a plane containing the central axis of the wheel, a profile that has two slopes ?, ? relative to a direction parallel to the central axis on going from the wheel disk to the corresponding flange, and flaring towards the flange.

A bicycle rim basically includes a first annular side surface portion, a second annular side surface portion, an annular connecting portion and an outermost layer. The first annular side surface portion includes a first braking surface. The second annular side surface portion includes a second braking surface. The epoxy resin layer is an example of a nonmetallic layer. The annular connecting portion connects the first and second annular side surface portions. The soft additive granules are disposed in at least one of the first and second annular side surface portions. The epoxy resin layer is disposed in at least one of the first and second annular side surface portions. The soft additive granules are at least partially embedded in the epoxy resin layer. The outermost layer covers the epoxy resin layer and the soft additive granules.

A bicycle rim basically includes a first annular side surface portion, a second annular side surface portion, an annular connecting portion and an outermost layer. The first annular side surface portion includes a first braking surface. The second annular side surface portion includes a second braking surface. The epoxy resin layer is an example of a nonmetallic layer. The annular connecting portion connects the first and second annular side surface portions. The soft additive granules are disposed in at least one of the first and second annular side surface portions. The epoxy resin layer is disposed in at least one of the first and second annular side surface portions. The soft additive granules are at least partially embedded in the epoxy resin layer. The outermost layer covers the epoxy resin layer and the soft additive granules.

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 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.

Disclosed is a wheel bearing assembly comprising a wheel hub fastened to a vehicle wheel so as to rotate as a unit and having a plurality of fastening protrusion portions, and a brake disc having a plurality of fastening protrusion portions respectively fastened to the plurality of fastening protrusion portions of the wheel hub. Thus, the wheel bearing assembly may facilitate weight reduction and improvement in ease of assembly, and enhance run-out properties of sliding surfaces of the brake disc.

Disclosed is a wheel bearing assembly comprising a wheel hub fastened to a vehicle wheel so as to rotate as a unit and having a plurality of fastening protrusion portions, and a brake disc having a plurality of fastening protrusion portions respectively fastened to the plurality of fastening protrusion portions of the wheel hub. Thus, the wheel bearing assembly may facilitate weight reduction and improvement in ease of assembly, and enhance run-out properties of sliding surfaces of the brake disc.

A wheel may include a centerless rim with a rail with a driving feature, where the rail protrudes towards a middle of the centerless rim in a first plane. The wheel may also include a stationary hub positioned along a second plane generally parallel with the first plane. The wheel may additionally include a roller guide assembly that includes a support member coupled to the stationary hub and configured to bridge the rail, and first and second roller guides coupled to the support member and positioned to roll along the centerless rim adjacent to and on either side of the rail. The wheel may additionally include a spring positioned to bias the first roller guide against the centerless rim.

A wheel may include a centerless rim with a rail with a driving feature, where the rail protrudes towards a middle of the centerless rim in a first plane. The wheel may also include a stationary hub positioned along a second plane generally parallel with the first plane. The wheel may additionally include a roller guide assembly that includes a support member coupled to the stationary hub and configured to bridge the rail, and first and second roller guides coupled to the support member and positioned to roll along the centerless rim adjacent to and on either side of the rail. The wheel may additionally include a spring positioned to bias the first roller guide against the centerless rim.