Abstract: A bicycle handlebar assembly includes a stem unit and a handlebar unit. The stem unit includes an upright tube which has a top end that is formed with a forwardly extending elongated prop. The prop has a distal front end which is formed with a horizontally disposed tubular connector. The tubular connector has an axis which is transverse to the prop. The handlebar unit includes a handlebar which extends through the tubular connector and which is retained rotatably thereat. The handlebar includes an intermediate tube portion and two end tube portions mounted on two ends of the intermediate tube portion. The intermediate tube portion has an outer wall surface formed with a plurality of angularly spaced engaging grooves that are accessed via a radial hole in the tubular connector. Each of the end tube portions has an auxiliary handle mounted thereon.

Abstract: An apparatus for connecting an auxiliary handle to a handlebar of a bicycle includes a tubular member having a partition plate which divides the tubular member into a first section which clamps the handlebar and a second section which has a first engaging member. A cylindrical member has a first end inserted into the second section of the tubular member. The cylindrical member has a blind bore and a second engaging member which engages the first engaging member of the tubular member in order to prevent the cylindrical member and tubular member being rotated with respect to each other. A bolt has a threaded end connected to the partition plate and an enlarged end. A spring member is disposed between the enlarged head of the bolt and the bottom of the blind bore of the cylindrical member, urging the first and second engaging members to engage each other.