Cycle Headsets

A headset transmission adapted to mount to or about a steerer tube rotationally mounted relative to a head-tube of a cycle frame via a headset, comprising or including:

• a first transmission member mountable at least in part about a rotational axis of said steerer tube, which first transmission member:
• can rotate with said steerer tube about said rotational axis;
• can translate relative to said steerer tube to transmit a first displacement force to or from a handle bar mounted lever or device;
• and
• wherein said first displacement force is transmitted to or from said first transmission member to said handle bar mounted lever or device from an interior of said steerer tube;
• a second transmission member mountable at least in part about said rotational axis of said steerer tube, which second transmission member:
• is mounted substantially only on, or from, said steerer tube,
• is rotationally isolated, so as to rotate relative to said first transmission member;
• can directly or indirectly translate with said first transmission member;
• and
• wherein said second transmission member allows transmission of a second displacement force, at least proportional to said first displacement force, to or from a cycle frame mounted lever or device.

A method of providing a headset transmission for a cycle, said cycle having a steerer tube mounted in a head-tube of a frame of said cycle via a headset, comprising or including the steps of:

• providing a first transmission member and a second transmission member mounted at least in part about a rotational axis of a steerer tube, at least said second transmission member is mounted substantially only on, or from, said steerer tube, such that said first transmission member can rotate about said rotational axis and translate along said steerer tube, and said second transmission member can translate with or is driven by said first transmission member but is isolated so as to not rotate with said first transmission member;
• providing a first driving or displacement force to or from said first transmission member via an internal region of said steerer tube;
• providing a portion of said second transmission member to receive or transmit a second driving or displacement force;
• and
• wherein said headset transmission can transmit a force to or from a handle bar device mounted on a handle bar of said steerer tube or part thereof, from or to a frame mounted device or vice versa, whilst allowing rotation of said steerer tube to more than 180 degrees.

A kit of parts adapted to provide at least one headset transmission for a frame of a cycle, said frame having a head-tube to receive a steerer tube to rotate thereon via a headset, comprising or including:

• a first transmission member mountable at least in part about a rotational axis of said steerer tube, which first transmission member:
• can rotate with said steerer tube about said rotational axis;
• can translate relative to said steerer tube to transmit a first displacement force to or from a handle bar mounted lever or device;
• and
• wherein said first displacement force is transmitted to said first transmission member from an interior of said steerer tube;
• a second transmission member mountable at least in part about said rotational axis of said steerer tube, which second transmission member:
• is rotationally isolated, so as to rotate relative to said first transmission member;
• can directly or indirectly translate with said first transmission member;
• and
• wherein said second transmission member allows transmission of a second displacement force, at least proportional to said first displacement force, to or from a cycle frame mounted lever or device.