Abstract: A fastening insert for cycle parts and especially pedal crank and crank gear parts, is composed of two parts, namely a lower insert and an upper insert, which are arranged to be joined together and fixedly connected by a mechanical connection. The lower and upper inserts each has flange bearing against a respective opposing face of the receiving cycle part, especially of the crank type.

Abstract: The headset for bicycles, cycles and the like of the type comprising, in a one-piece cartridge, a bearing assembly (3) inserted between an outer cup (2) and an inner cup (4), the outer cup bearing against the interior wall of a bore in the head tube, is notable in that it comprises, as one piece,said cartridge including a floating reinforced seal, on which there is positioned a ring which itself on the outside has a seal bearing against the outer cup,said ring being in contact with the inner cup of the cartridge, the ring housing, in its upper part, an O-ring and a compression ring in order to give compression stresses.