A bicycle seat is provided that allows for dynamic adjustment of longitudinal seat position when a locking mechanism is unlocked. In one embodiment, the unlocking is accomplished by lifting the nose of the seat body away from the base, thus providing the capability of dynamic adjustment of longitudinal or fore-aft seat position while riding without the component complexity and aerodynamic drag limitations of prior art devices. In an alternative embodiment, a bolt protruding from the seat body is retracted to disengage the locking mechanism and allow dynamic adjustment of longitudinal seat position without lifting the nose of the seat body. A vertical adjustment corresponding to the longitudinal position of the seat is taught to maintain, if desired, the same distance between bike seat and pedals for any longitudinal position of, the seat.