Abstract: A seat for a bicycle comprising: a seating surface having a longitudinal length, a longitudinally forward portion, a longitudinally rearward portion, and a lateral width between a first lateral end and a second lateral end laterally opposed to the first lateral end; an underside surface below the seating surface; an opening extending through the seating surface and the underside surface; where the opening has an opening length between a longitudinally forward periphery and a longitudinally rearward periphery and an opening width between a first lateral periphery and a second lateral periphery laterally opposed to the first lateral periphery; where the seating surface includes a bridge portion longitudinally located between the opening and the rearward portion of the seating surface; and where the opening has a lateral width greater than its longitudinal length.

Abstract: A seat for a bicycle comprising: a seating surface having a longitudinal length, a longitudinally forward portion, a longitudinally rearward portion, and a lateral width between a first lateral end and a second lateral end laterally opposed to the first lateral end; an underside surface below the seating surface; an opening extending through the seating surface and the underside surface; where the opening has an opening length between a longitudinally forward periphery and a longitudinally rearward periphery and an opening width between a first lateral periphery and a second lateral periphery laterally opposed to the first lateral periphery; where the seating surface includes a bridge portion longitudinally located between the opening and the rearward portion of the seating surface; and where the opening has a lateral width greater than its longitudinal length.

Abstract: An improved bicycle tire tread comprising selected combinations of tread block and trough dimensions and concave, convex and beveled tread surface configurations, is disclosed.

Abstract: The forks of a bicycle receive an axle having threaded ends. A tube surrounds the axle and carries ball bearings on which a wheel housing is rotatable with a space between the tube and the housing. Specially shaped seals engage the wheel housing and the tube between the ball bearings to keep lubricant out of the space between the seals. A special lever lock on one end of the axle cooperates with a nut on the other end of the axle to draw together the parts engaged with the axle, the tube and the housing.