A pedally propelled vehicle gear shift actuator configured to be arranged about a rotatable gear shift element of a hub gear, said gear shift actuator comprising; first and second clutch elements (83, 113), and first and second return means (91, 121), said pedally propelled vehicle gear shift actuator wherein - said first and second clutch elements (83, 113) are arranged to be disengaged from said gear shift element in an initial position; said first clutch element is arranged to engage with and rotate said gear shift element in a first rotational direction, when moving in a single direction, first linear movement from said initial position; - said second clutch element is arranged to engage with and rotate said gear shift element in a second rotational direction, when moving in a single direction, second linear movement from said initial position; said second rotational direction is opposite said first rotational direction; and said first and second return means (91, 121) providing a return force on said first and second clutch elements (83, 113) opposite said first and second linear movements, respectively, to independently return said first and second clutch elements (83, 113) to said first initial position, and characterised in that said first and second clutch elements (83, 113) are arranged to disengage from said gear shift element when moved in a direction opposite said first and second linear movement, respectively; and said first and second clutch elements (83, 113), comprising; an engagement rack (94, 124), arranged with at least two engagement teeth (150, 151, 152, 153, or 154), and said shift element is arranged with a circle of pinion teeth, wherein; - said engagement teeth (150, 151, 152, 153, or 154) mesh with said pinion teeth when moved in a single direction, first or second linear movement, and said gear shift actuator further comprising; pivoting means (109, 156), wherein; - said rack (94, 124) pivoting laterally on said pivoting means (109, 156) towards engagement with the shift element when said first or second clutch elements (83, 113) are moving in a single direction, first or second linear movement from said initial position; - said rack (94, 124) pivoting laterally on the means (109, 156) away from engagement with the shift element when said first and second clutch elements (83, 113) are moving in a direction opposite said first and second linear movement. - said first and second clutch elements (83, 113) are arranged to be disengaged from said gear shift element in an initial position; said first clutch element is arranged to engage with and rotate said gear shift element in a first rotational direction, when moving in a single direction, first linear movement from said initial position; - said second clutch element is arranged to engage with and rotate said gear shift element in a second rotational direction, when moving in a single direction, second linear movement from said initial position; said second rotational direction is opposite said first rotational direction; and said first and second return means (91, 121) providing a return force on said first and second clutch elements (83, 113) opposite said first and second linear movements, respectively, to independently return said first and second clutch elements (83, 113) to said first initial position, and characterised in that said first and second clutch elements (83, 113) are arranged to disengage from said gear shift element when moved in a direction opposite said first and second linear movement, respectively; and said first and second clutch elements (83, 113), comprising; an engagement rack (94, 124), arranged with at least two engagement teeth (150, 151, 152, 153, or 154), and said shift element is arranged with a circle of pinion teeth, wherein; - said engagement teeth (150, 151, 152, 153, or 154) mesh with said pinion teeth when moved in a single direction, first or second linear movement, and said gear shift actuator further comprising; pivoting means (109, 156), wherein; - said rack (94, 124) pivoting laterally on said pivoting means (109, 156) towards engagement with the shift element when said first or second clutch elements (83, 113) are moving in a single direction, first or second linear movement from said initial position; - said rack (94, 124) pivoting laterally on the means (109, 156) away from engagement with the shift element when said first and second clutch elements (83, 113) are moving in a direction opposite said first and second linear movement.