Abstract: A bicycle seat for a bicycle having a frame with a seat post. A seat base plate is mounted at the upper end of the seat post. Passenger supporting extensions are mounted pivotally on the base plate for limited angular displacement relative to a fore-and-aft centerline of the seat. A cushion member is supported on the base plate, a cushion with a rounded peripheral surface is secured to each extension, the cushion for the base plate having a rounded periphery that registers with the rounded surface of each cushion on the extensions. The cushion for the base plate has a rearward margin defining a shoulder providing a reaction location that accommodates rearward force reaction to forces applied by the right ilium and the left ilium of the pelvis of a bicycle rider. Each cushion for the extensions cooperates with the rounded periphery of the base plate cushion to form a crease that is positioned to receive an ischium extremity of the pelvis of a bicycle rider.

Abstract: A bicycle seat for a bicycle having a frame with a seat post. A seat base plate is mounted at the upper end of the seat post. Passenger supporting extensions are mounted pivotally on the base plate for limited angular displacement relative to a fore-and-aft centerline of the seat. A cushion member is supported on the base plate, a cushion with a rounded peripheral surface is secured to each extension, the cushion for the base plate having a rounded periphery that registers with the rounded surface of each cushion on the extensions. The cushion for the base plate has a rearward margin defining a shoulder providing a reaction location that accommodates rearward force reaction to forces applied by the right ilium and the left ilium of the pelvis of a bicycle rider. Each cushion for the extensions cooperates with the rounded periphery of the base plate cushion to form a crease that is positioned to receive an ischium extremity of the pelvis of a bicycle rider.