Abstract: A bicycle seat has a pair of guide rails each having a seat pad pivotably attached to the front end of the guide rail. An elongated support has a wing at each end. The guide rails travel on the wings in two substantially parallel paths. A pulley is mounted on the center of the elongated support. One or more straps are connected to the front ends of the guide rails or the back ends of the guide rails so that motion of one guide rail in a first direction causes movement of the second guide rail in an opposite direction. One or more springs can be connected between the guide rails and the elongated support.