in a preferred embodiment , a shock - absorbing bicycle seat mount , including a post fixedly attached to a bicycle seat at a proximal end of the post , a distal end of the post being inserted into a bicycle seat tube for axial movement therein ; biasing apparatus disposed within the seat tube to support the post ; an axial movable platform disposed within the seat tube to support the biasing apparatus and the post ; biasing apparatus external of the seat tube disposed to connect the support platform to an upper portion of the seat tube ; apparatus to prevent rotational movement of the post within the seat tube ; and means to manually fix a minimum height of the post and attached saddle with dis - engagement of the shock - absorbing apparatus at that point .