A drive device for driving and rotating a wheel includes an axle shaft, a hub to which rotation of the axle shaft is conveyed, a plurality of fasteners for securing the wheel to the hub, a wet brake, a housing, an oil seal, and a cover. The wet brake is configured to restrain the rotation of the axle shaft. The housing accommodates the axle shaft and the wet brake. The oil seal is disposed between the housing and a part of the hub that is disposed inward of the fasteners in a radial direction of the hub. The cover has an annular shape. The cover is disposed in a space formed between the hub and the housing, and is secured to the housing. The cover is configured to cover the plurality of fasteners.

A circular wheel is aligned in a rotational plane and has a peripheral outfacing surface symmetrical about the plane of rotational. A center line of the width of the peripheral outfacing surface is sinusoidal around the wheel. The wheel may have a central hub, a rim, a medial wheel structure between the hub and the rim, and a tire mounted on the rim. The outfacing surface may be that of the hub, the medial wheel structure, the rim, or the tire depending on the application.

A bicycle having a widened rear wheel preferably includes an existing bicycle, a double tire rear wheel, a widened crank tube, a widened crank and widened rear fork. The existing bicycle includes a bicycle frame, a front wheel, handlebars, and a seat. The bicycle frame includes a frame unit and a crank set. The frame unit includes a base frame portion, a front fork and a rear fork. The base frame portion includes a top tube, a seat tube, a down tube and a crank tube. The crank tube is replaced with the widened crank tube. The rear fork is replaced with a widened rear fork. A crank of the crank set is replaced with the widened crank. The widened rear wheel preferably includes three bicycle tire rims, a plurality of spokes, two tires and a lengthened rear wheel hub.

A bicycle having a widened rear wheel preferably includes an existing bicycle, a double tire rear wheel, a widened crank tube, a widened crank and widened rear fork. The existing bicycle includes a bicycle frame, a front wheel, handlebars, and a seat. The bicycle frame includes a frame unit and a crank set. The frame unit includes a base frame portion, a front fork and a rear fork. The base frame portion includes a top tube, a seat tube, a down tube and a crank tube. The crank tube is replaced with the widened crank tube. The rear fork is replaced with a widened rear fork. A crank of the crank set is replaced with the widened crank. The widened rear wheel preferably includes three bicycle tire rims, a plurality of spokes, two tires and a lengthened rear wheel hub.

A single-piece woven fiber structure for fabricating an axisymmetric part of varying diameter made out of composite material, the fiber structure having a portion of frustoconical shape with a large diameter and a small diameter, the ratio between the large diameter and the small diameter being not less than 2. The fiber structure is formed by winding layers of warp and weft yarns that are woven on a mandrel having a profile that is defined as a function of the profile of the part to be fabricated with warp yarn take-up. For each layer of yarns, the weft yarns are angularly distributed on a single diameter in a zone of the large diameter of the portion of frustoconical shape and on at least two different diameters in a zone of the small diameter of the portion of frustoconical shape in order to form at least two superposed plies of weft yarns.

A single-piece woven fiber structure for fabricating an axisymmetric part of varying diameter made out of composite material, the fiber structure having a portion of frustoconical shape with a large diameter and a small diameter, the ratio between the large diameter and the small diameter being not less than 2. The fiber structure is formed by winding layers of warp and weft yarns that are woven on a mandrel having a profile that is defined as a function of the profile of the part to be fabricated with warp yarn take-up. For each layer of yarns, the weft yarns are angularly distributed on a single diameter in a zone of the large diameter of the portion of frustoconical shape and on at least two different diameters in a zone of the small diameter of the portion of frustoconical shape in order to form at least two superposed plies of weft yarns.

A locking device for releasable locking with a counter body, having a base body, which is connected together with an add-on element and a connection element, and actuation means. One or more slides are fastened to the actuation means, which exert a relative movement to the locking device, whereby the slides are able to be brought into contact with the locking means and these can be transferred into a counter geometry of the counter body. Here, the actuation means remain in their respective position due to the return springs of the locking means and of the tension resulting therefrom as well as of a frictional resistance between locking means and slides. An automatic securing device is provided as secondary securing, designed as a spring-loaded securing bolt for securing the position of the actuation means and prevents unintentional opening of the locking device.

A dual wheel mounting device having an inner wheel mount, a plurality of spaced fins connected to and extending outwardly from the inner wheel mount, and a plurality of U-shaped ribs aligned with and connected to the spaced fins. An outer ring is received within and connected to slots in the U-shaped ribs.

A dual wheel mounting device having an inner wheel mount, a plurality of spaced fins connected to and extending outwardly from the inner wheel mount, and a plurality of U-shaped ribs aligned with and connected to the spaced fins. An outer ring is received within and connected to slots in the U-shaped ribs.

An axle assembly and a method of assembly. An outboard wheel is mounted to an outboard mounting arrangement of a wheel hub. An inboard wheel and a brake drum are mounted to an inboard mounting arrangement of the wheel hub such that a brake drum mounting arrangement of the brake drum is axially positioned between the inboard wheel and the inboard mounting arrangement.