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: A caliper brake for wide-tire mountain bicycles. Each caliper arm is pivotally mounted to a stationary pivot post of the bicycle frame via a cylindrical bushing to which the arm is press fitted. A return spring is retained around the pivot post in a normally stationary portion enabling purposeful adjustment. A brake shoe holder is mounted on one end of the caliper arm, and a roller-mounting post is secured to the other end. A cam roller is mounted rotatably on the roller mounting post by a low-friction bearing and has a circumferential groove engaging a cammed edge of a cam plate, to which a brake-actuating cable is secured. The brake shoe holder is preferably asymmetrical and is mounted for adjustment lengthwise of the caliper arm and for rotation around it and is also made adjustable as to the spacing from the caliper arm and as to the rotational position around an axis perpendicular to that arm.

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.

Abstract: A bicycle seat post for supporting a saddle on a bicycle frame. A tube cap is secured to the upper end of a tube and provides a cylindrical-segment upper surface. There is a generally cylindrical concentric inner surface, and an oversize upward passage through both surfaces. A cylindrical swivel pin is in engagement with the inner surface. The saddle has a rigid frame that is to be clamped between upper and lower clamp members. The lower clamp member has an upper clamping surface and a lower cylindrical-segment surface in engagement with the cylindrical upper surface of the tube cap. The upper clamp member has a lower clamping surface and a threaded vertical opening. The assembly is held together by a single bolt, preferably extending up from the bottom of the tube cap, through a diametric opening in the swivel pin, through an opening through the lower clamp member, and into the threaded opening of the upper clamp member, tightening all the members together and to the saddle.