Spoke for cycle wheel, cycle wheel, and manufacturing method

A method for manufacturing a spoke for a cycle wheel having a tapered body portion with a predetermined length and two ends respectively for fastening the spoke to a hub and a rim, the tapered body portion, proximate the two ends, having a diameter of at least 2.7 millimeters, the tapered body portion being smooth and exempt from threading over an entirety of the length of the tapered body portion, the spoke being made of a heat treated light alloy, each of the ends having an enlarged head, and at least one hollow fastening end piece being mounted in free rotation between the two enlarged heads, wherein said method comprises the following:

• cutting a filament of a predetermined length from a wire of light alloy with precipitation hardening in the annealed state,
• fitting on the filament a recessed screw made out of an alloy having the same grade as the alloy of the thread,
• punching both ends to form an enlarged head at each end of the segment,
• subjecting the assembly to tempering heat treatment.

A metal spoke for a cycle wheel comprising:

• an elongated body portion and two opposite end portions, said elongated body portion and said end portions being made from a heat-treated light alloy, an entirety of said elongated body portion being smooth and non-threaded;
• each of said two opposite end portions comprising an enlarged head and, proximate each of said enlarged heads, said elongated body portion having a circular cross section with a diameter of greater than or equal to 2.7 millimeters, one of said end portions being adapted to be fastened to a hub and another of said end portions being adapted to be fastened to a rim;
• and
• at least one hollow fastening end piece is mounted in free rotation between said enlarged heads of said opposite end portions.

A cycle wheel comprising:

• a rim;
• a hub;
• said rim and said hub being connected by a plurality of spokes, said rim including a plurality of threaded openings, each of said plurality of spokes comprising:
• an elongated body portion and two opposite end portions, said elongated body portion and said end portions being made from a heat-treated light alloy, an entirety of said elongated body portion being smooth and non-threaded;
• each of said two opposite end portions comprising an enlarged head and, proximate each of said enlarged heads, said elongated body portion having a circular cross section with a diameter of greater than or equal to 2.7 millimeters;
• a first of said two end portions of each of said spokes being fastened to said hub;
• for each of said spokes, at least one hollow fastening end piece mounted in free rotation about a second of said end portions and between said enlarged heads of said two opposite end portions, said hollow fastening end piece having external threads;
• a second of said two end portions of each of said spokes being fastened to said rim by means of said external threads of said hollow fastening end piece being engaged with a respective one of said threaded openings of said rim.