A vent plug having a main vent aperture that extends from an inner side into the plug and connects to a transverse vent passage that intersects the main vent aperture. The main vent aperture and the transverse vent passage are connected to provide a continuous path for fluid communication. The main vent aperture includes a conical surface that is tapered to be narrower nearer the inner side of the vent plug. A poppet is located within the main vent passage and the poppet has a stem that extends from a distal portion of the poppet. The stem has a shoulder that is opposite the distal portion. The distal portion is adjacent to the conical portion of the main vent aperture. The distal portion has an annular recess for receiving a seal. The poppet is movable between an open and closed position.

A saddle-ride vehicle includes: a wheel having a hub and supported by an axle; a brake disc attached to the hub; a brake caliper capable of clamping the brake disc; and a wheel cover held between the hub and the brake disc and covering a side surface of the wheel. The wheel cover is formed larger than the brake disc and forms a gap with the wheel at an outer peripheral end, and the wheel cover is provided with vent holes penetrating the cover surface in a direction of the axle.

A hubcap includes a monolithic main body. The monolithic main body includes (i) a sidewall having an annular cross-section, a hub end, and a vent end opposite the hub end, (ii) an end-cap abutting and spanning across the vent end, and (iii) a flange abutting and at least partially surrounding the hub end. The flange has an outer flange-surface facing the vent end and, opposite the outer flange-surface, an inner flange-surface that defines an annular channel.

A vehicle wheel structure includes: a wheel; and a wheel mounting member. The wheel mounting member includes a diversion mechanism including a first member, a second member, an inlet provided to the first member to lead air into a space between the first member and the second member in an air opening provided to a disk having a plate shape, an obstruction section configured to obstruct a flow of the air led from the inlet, and an outlet provided to the second member to lead the air moved by the flow of air obstructed by the obstruction section to the outer side of the vehicle. The disk forms the wheel.

A wheel for a vehicle includes a wheel disk including a hub to be coupled to an axle, a plurality of spokes extending radially from the hub, and a wheel rim formed on an outside of the spokes, an opening and closing module provided between the spokes and coupled to the wheel disk, an opening and closing member controlling opening and closing of the opening formed in the opening and closing module, and a driving unit engaged to and driving the opening and closing member.