Abstract: In the headset of a bicycle in which a clamping ring connected to the fork stem is compressed by a locknut into engagement with the handlebar stem, to thereby connect the handlebar stem to the fork stem, means are provided for locking the clamping ring to the fork stem to prevent undesired movement of the handlebars with respect to the fork stem.

Abstract: An improved upper member for the two-part ball race of a bicycle headset is provided which is light in weight and has a ball engaging surface which follows closely the contours of the balls.

Abstract: A connection between the handlebars and the steering fork of a bicycle wherein the handlebar stem is positioned within the steering fork. The connection includes a contractile clamping ring surrounding and connected by threads to the upper end of the fork stem. The clamping ring has an internal unthreaded surface surrounding the adjacent part of the handlebar stem and a frusto-conical external surface. A locknut loosely surrounds the handlebar stem and is connected by threads to the clamping ring. The locknut has a frusto-conical internal surface which engages the frusto-conical external surface of the clamping ring for causing engagement of the unthreaded internal surface of the clamping ring with the fork of the handlebar stem. The clamping ring has a plurality of radial cuts, and the internal surface of the upper part of the locknut is provided with a circumferential series of spaced notches which may be aligned with the cuts.

Abstract: The disclosure is of a device for connecting the handlebars to the steering fork of a bicycle.

Abstract: The invention relates to a control mechanism for multi-speed bicycles in which operation of both the front and rear derailleurs is performed by a single lever.