An adjustable positioning structure of a bearing of a bicycle wheel rim contains: a central shaft, two screw nut devices, two bearing caps, two fitting sleeves, two fixers, and two abutting elements. The central shaft includes two threaded portions. Each s...

A wheel frame (10) of fiber composite material includes multiple arched frame bars (20) each including a foam body (30) made out of a foam material and a fiber composite cover layer (40) made out of a fiber composite material and wrapped about the foam bod...

The body (1) has a round outer part (2) with a side surface (6), where the body is rotatably mounted around a rotational axis and partially overflown by a turbulent flow of a medium during rotation around the axis. A part of a surface of the outer part inc...

An assembling structure for wheel (20) and hub (10) of an electric bicycle is disclosed, the structure capable of firmly assembling a hub and a wheel by separately manufacturing the hub embedded with a motor and a transmission gear box from the wheel, the ...

A wheel rim configured to enhance the durability of the tire by reducing the temperature of the tire during running. A wheel rim 1 consisting of a metallic material and adapted so that a pneumatic tire 2 is mounted thereon, wherein a coating 5 having high ...

In a bicycle spoked wheel (11), at least one infraspoke zone (1501) has a reduced average wall thickness to reduce or eliminate the dynamic imbalance of the wheel (11) due to localized mass increases at the valve (7) and at a possible joint (134).

A noise damper (1r,1t) disposed in a tire cavity (5) formed by a pneumatic tire (2) and wheel rim (3) is disclosed. A noise damper (1r) designed to use with a wheel rim (3) comprises an annular body disposed around a damper-mounting portion (3w) of the whe...

Belt (34) rigidity exerts lateral- and radial gripping forces (FL, FR) on the contact zone (33a) of the annular sectors (31) when they are mounted coaxially between side walls of the recess (11). The belt holds the annular sectors against one sidewall (11a...

A wheel rim (30) includes a chamber (33) defined in a center of the rim' and a hole (32) is defined through a side of the rim. A rubber valve (40') is engaged with the hole of the rim and has a flange (400) which is engaged with an inner periphery of the c...

The tyre support consists of a rigid aluminium or plastic ring made up of two or more curved sectors (20) fixed to the inside of a non-standard one-piece wheel rim (1) which has a second peripheral cavity (17) separated from its first tyre-fitting cavity (...