A bicycle rim comprises a base member, a cover member, and a spoke attachment member. The base member includes a truss structure that defines at least one opening. The cover member at least partly covers the at least one opening of the base member. The spoke attachment member is a separate member from the base member and the cover member. The spoke attachment member is non-rotatably attached to the base member.

A bicycle rim comprises a base member, a cover member, and a spoke attachment member. The base member includes a truss structure that defines at least one opening. The cover member at least partly covers the at least one opening of the base member. The spoke attachment member is a separate member from the base member and the cover member. The spoke attachment member is non-rotatably attached to the base member.

Disclosed is a wheel for vehicles, in particular with electric or hybrid propulsor, apt to recover at least a part of the energy which is required in order to deform the tire of the wheel during its rotation and to transfer the energy, recovered in this manner, from the wheel to the vehicle on which the wheel is mounted, so that this energy, recovered, is used to generate the electrical energy intended to feed the devices installed on the vehicle, such as in particular the respective electric propulsor.

The present invention relates to a coating and a frame for wheels. The coating has a hollow cylindrical configuration and extends radially between inner and outer portions. The outer portion acts as a tread element and confers the ability to maintain, in use, contact with the ground, to such coating. The inner portion defines a plurality of engagement elements. The frame comprises a hub, a crown and a supporting element which operates in connection between the hub and the crown. The crown is arranged peripherally with respect to the hub and acts as a support element for the coating when the coating is applied to the frame so as to externally encircle the crown. The crown defines a plurality of engagement elements. The engagement elements of the coating and the crown create an interference-type coupling between the coating and the frame, generating forces in the tangential direction.

Embodiments of collapsible wheels and methods of making collapsible wheels are generally described herein. Other embodiments may be described and claimed.

Embodiments of collapsible wheels and methods of making collapsible wheels are generally described herein. Other embodiments may be described and claimed.

A method for making a carbon fiber wheel rim includes: preparing an outer supporting piece; winding a carbon-fiber yarn around the outer supporting piece to form carbon fiber layers and to constitute an engaging seat preform; connecting an inner supporting piece to the engaging seat preform; connecting a reinforcement piece to the inner supporting piece; winding a carbon-fiber yarn around an assembly of the engaging seat preform, the inner supporting piece and the reinforcement piece to form carbon fiber layers; fixing the assembly with the carbon fiber layers to form an outer frame preform; and cutting the outer frame preform and the engaging seat preform to form a trench and removing the outer supporting piece therefrom.

A method for making a carbon fiber wheel rim includes: preparing an outer supporting piece; winding a carbon-fiber yarn around the outer supporting piece to form carbon fiber layers and to constitute an engaging seat preform; connecting an inner supporting piece to the engaging seat preform; connecting a reinforcement piece to the inner supporting piece; winding a carbon-fiber yarn around an assembly of the engaging seat preform, the inner supporting piece and the reinforcement piece to form carbon fiber layers; fixing the assembly with the carbon fiber layers to form an outer frame preform; and cutting the outer frame preform and the engaging seat preform to form a trench and removing the outer supporting piece therefrom.

Embodiments of collapsible wheels and methods of making collapsible wheels are generally described herein. Other embodiments may be described and claimed.

Embodiments of collapsible wheels and methods of making collapsible wheels are generally described herein. Other embodiments may be described and claimed.