Patent ID: 7204169

Claim:
A gearshift mechanism comprising: a handgrip member disposed on a handlebar having an outer surface, the handgrip member rotatable about an axis relative to first and second followers and having a bore and first and second guide paths on a substantially cylindrical inner surface portion within the bore wherein the first and second guide paths comprise grooves on the inner surface of the handgrip member; the first and second followers respectively engaging the first and second guide paths; and, first and second anchors coupled respectively to the first and second followers; wherein the substantially cylindrical inner surface portion of the handgrip member fits around the outer surface of the handlebar and, rotation of the handgrip member about the axis simultaneously adjusts positions of the first and second anchors; wherein the handlebar is hollow and the first and second followers are coupled respectively to the first and second anchors by members which extend through a bore of the handlebar.