Abstract: A crank includes a through hole defined in a first end thereof for receiving one of two ends of an axle in the bottom bracket, and a threaded hole defined in a second end of the crank so as to be connected with a pedal. A passage is defined through the crank and communicates with the through hole. A positioning assembly is received in the passage and includes two tubular members which are pulled toward each other by a bolt threadedly extending through the two tubular members. A concave surface is defined in each of the two tubular members so that the axle is pressed in position by the concave surfaces of the two tubular members.

Abstract: A bicycle rim includes a plurality of holes defined therethrough and each hole has a recess defined in an inner periphery of the rim. A diameter of the recess is larger than a diameter of the hole so that an end of a spoke is engaged with the recess. A screw extends through the hole in the rim and threadedly engaged with a threaded hole defined longitudinally in the end of the spoke.

Abstract: A bicycle wheel rim includes a plurality of connectors each having a spoke engaging hole for connecting with a spoke, and two protrusions extend from two ends of each connector. A plurality of holes are defined through each protrusion and a plurality of loops extend through the holes of the connectors which are arranged as a circle. Each protrusion has a recess defined in an inside thereof so as to be engaged with a tire. The loops and the connectors are made by carbon fiber or compound material.

Abstract: A bicycle headset. The bicycle headset includes an upper bearing cover and a tapered ring that are made integrally in the form of a hollow arcuate circular ring capable of being fastened with precision.

Abstract: A steering bearing assembly includes a head tube, a steerer tube that has a first end which is connected to a front fork of a bicycle and which extends through the head tube, and a bearing assembly disposed between the head tube and the steerer tube. A truncated cone-shaped inserter is disposed in a second end of the steerer tube and has an axially extending threaded bore formed therethrough. A C-shaped resilient member with an inner tapered wall is press-fitted into the steerer tube above the inserter. A threaded bolt is disposed on the second end of the steerer tube and is threaded into the inserter. When the threaded bolt is tightened, the resilient member expands radially to abut frictionally against the steerer tube and to compress downward simultaneously a stem that is disposed on the head tube around the steerer tube.