An improved wheel cover for large commercial vehicle trailers is disclosed. It includes simple and robust mechanism for attachment with the wheel, facilitates easy installation and removal, and provides better aerodynamics and fuel efficiency during travel. In a preferred embodiment, an annular flexible shell cover (covering an annular magnet) of the wheel cover, deforms and frictionally fits into hollow of a corresponding wheel flange, and the annular magnet (lying under the shell cover) keeps the shell cover magnetically attached (with a strong magnetic bonding) with the flange. Hence, in addition to the magnetic bonding, the installed wheel cover is held in place by a friction fitting between the shell cover and the flange. The outer side of the wheel cover can either be kept planar or curved, and its surface can be dimpled or smooth.

An insert for the rim of a spoked bicycle wheel that has a spoke hole. The insert has a portion configured to abut against a spoke attachment element with an enlarged head and a holding element that prevents movement of the spoke attachment along said longitudinal axis of the spoke hole.

A wheel cover assembly for a vehicle wheel may include a cover body having a cover body outer surface, a cover body inner surface, and a cover body outer edge having an outer diameter that is greater than an inner diameter of a stiffener rib extending inward from an inner surface of the wheel rim and less than an inner diameter of an open end flange of the wheel rim. The wheel cover assembly may further include a cover mounting mechanism operatively connected to the cover body and having a locking position wherein the cover mounting mechanism engages the stiffener rib when the cover body inner surface is facing and engaging the stiffener rib and a cover locking position wherein the cover mounting mechanism engages the stiffener rib to secure the wheel cover assembly to the vehicle wheel.

Methods and systems of an active aerodynamic wheel cap device are provided. The active aerodynamic wheel cap device can be mounted to a vehicle wheel and configured to actuate from a flap-open to a flap-closed state. The flap-open state provides an air vent path from an outer portion of a wheel to an internal component of the wheel, especially at low speeds or during braking. The flap-closed state provides a substantially gapless aerodynamic cap for the wheel of the vehicle at highway speeds or during acceleration. The actuation of the active aerodynamic wheel cap device may be based on an all-mechanical controlled centripetal force movement mechanism.

There is provided a wheel device for a vehicle including: a wheel having an opening formed between adjacent spokes; a brake mechanism located inside the wheel in a vehicle width direction and having a brake caliper and a brake rotor; and an arc portion extending in a circular direction in the opening and suspended between the adjacent spokes. The arc portion has a recessed portion recessed outward in the vehicle width direction inside thereof in the vehicle width direction, and the arc portion and the brake caliper are located at such positions that they overlap with each other in a state viewed in the vehicle width direction.

An aerodynamic bicycle rim, the bicycle rim comprising a circumferential clincher portion adapted to seat a clincher bicycle tire, a nose a set of sidewalls, each sidewall extending radially from the nose to a respective circumferential outer edge to form a rim body having a maximum rim body width that is greater than a maximum width of the clincher bicycle tire and spaced radially inward of the clincher portion and radially outward from a centerline of the rim body. The aerodynamic bicycle rim seats the clincher bicycle tire to form an asymmetrical cross-sectional shape in which the widest part of the rim body is spaced from a centerline of the asymmetrical cross-sectional shape and there is a tangent line tangent to the clincher bicycle tire and a sidewall of the set of sidewalls, the tangent line tangent to the sidewall radially inward from the respective circumferential outer edge.

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 bicycle disc wheel includes two discs respectively formed of two composite material layers with a foam material bonded between the two composite material layers, a wheel frame arranged between the two discs in a concentric manner; and a spoke frame composed of a plurality of I-shaped ribs and sandwiched between the two discs. Each I-shaped rib is composed of a foam material and a composite material cladded on the foam material. Each I-shaped rib has a relatively wider opposite upper and lower sides and a relatively narrower middle section when it is viewed from the cross section, and the relatively wider opposite upper and lower sides of each I-shaped rib are respectively attached to the respective inner side of the two discs.

Described herein are aerodynamic wheels. According to some embodiments there is provided a wheel for a vehicle comprising: a rim; an inner hub; an attachment assembly configured to couple rim to inner hub; a first air engaging flexible and aerodynamic surface overlaying the attachment assembly configured to couple rim to inner hub and operatively connected to the inner hub and the rim, forming a first axial surface of the wheel; and a second air engaging flexible and aerodynamic surface overlaying the attachment assembly configured to couple rim to inner hub and operatively connected to the inner hub and the rim, forming a second axial surface of the wheel, which is axially opposed to the said first surface of the wheel; wherein said first air engaging flexible and aerodynamic surface and second air engaging flexible and aerodynamic surface are adaptable to external forces and change shape, when subject to such external forces.

An insert rubber for improving aerodynamics of a tire and an installation method thereof, and provides an insert rubber for improving aerodynamics of a tire and an installation method thereof, in which, by eliminating a space which is located between a bead of a tire and a flange of a rim, airflow is prevented from being introduced between the bead and the flange while a vehicle travels, and the space between the bead and the flange is filled with the insert rubber, thereby preventing turbulence from being generated in the space between the bead and the flange.