A bicycle seat post assembly comprising: a lower seat support adapted to be secured to a bicycle frame; an upper seat support adapted to be secured to a bicycle seat and movable relative to the lower seat support; and an adjusting mechanism coupling the lower seat support to the upper seat support, the adjusting mechanism including: a powered actuator engageable with both the lower seat support and the upper seat support and configured to move the upper seat support relative to the lower seat support; and a coupling device selectively connecting the powered actuator to one of the lower seat support or the upper seat support, the coupling device having a connected state wherein the powered actuator is operatively connected to the one of the lower seat support or the upper seat support and a disconnected state wherein the powered actuator is operatively disconnected from the one of the lower seat support or the upper seat support, wherein: the powered actuator, in the connected state, can be actuated to move the upper seat support in a first direction relative to the lower seat support; and with the powered actuator disconnected from one of the lower seat support or the upper seat support the upper seat support can be moved in a second direction relative to the lower seat support, the second direction being substantially opposite the first direction. a lower seat support adapted to be secured to a bicycle frame; an upper seat support adapted to be secured to a bicycle seat and movable relative to the lower seat support; and an adjusting mechanism coupling the lower seat support to the upper seat support, the adjusting mechanism including: a powered actuator engageable with both the lower seat support and the upper seat support and configured to move the upper seat support relative to the lower seat support; and a coupling device selectively connecting the powered actuator to one of the lower seat support or the upper seat support, the coupling device having a connected state wherein the powered actuator is operatively connected to the one of the lower seat support or the upper seat support and a disconnected state wherein the powered actuator is operatively disconnected from the one of the lower seat support or the upper seat support, wherein: the powered actuator, in the connected state, can be actuated to move the upper seat support in a first direction relative to the lower seat support; and with the powered actuator disconnected from one of the lower seat support or the upper seat support the upper seat support can be moved in a second direction relative to the lower seat support, the second direction being substantially opposite the first direction. a powered actuator engageable with both the lower seat support and the upper seat support and configured to move the upper seat support relative to the lower seat support; and a coupling device selectively connecting the powered actuator to one of the lower seat support or the upper seat support, the coupling device having a connected state wherein the powered actuator is operatively connected to the one of the lower seat support or the upper seat support and a disconnected state wherein the powered actuator is operatively disconnected from the one of the lower seat support or the upper seat support, wherein: the powered actuator, in the connected state, can be actuated to move the upper seat support in a first direction relative to the lower seat support; and with the powered actuator disconnected from one of the lower seat support or the upper seat support the upper seat support can be moved in a second direction relative to the lower seat support, the second direction being substantially opposite the first direction. the powered actuator, in the connected state, can be actuated to move the upper seat support in a first direction relative to the lower seat support; and with the powered actuator disconnected from one of the lower seat support or the upper seat support the upper seat support can be moved in a second direction relative to the lower seat support, the second direction being substantially opposite the first direction.