Abstract: A connecting method of a wheel rim of a bicycle includes the following steps: forming a wheel rim, inserting an inner connecting member between two abutment ends of the wheel rim, connecting the two abutment ends, heating, packing, permeating, and returning. Thus, the structural strength of the wheel rim is enhanced, thereby increasing the lifetime of the wheel rim. In addition, the connecting seam of the two abutment ends will not form a protruding rough bur, so that it is unnecessary to perform a secondary working process to grind the surface of the connecting seam of the two abutment ends, thereby simplifying the working process of the wheel rim, and thereby decreasing costs of fabrication.

Abstract: A positioning device includes a sleeve member engaged with one of holes defined in the wheel rim and a base has its shank extending through a passage of the sleeve member. A threaded hole is defined in the shank so that an end of a spoke is threadedly engaged with the threaded hole in the shank. A sealing ring made of non-metallic material is mounted to the sleeve member so as to seal the hole in the rim. The coating of the rim is not scrubbed by any of the parts of the positioning device and the installing processes are easy and can be finished within a short period of time.

Abstract: A tubeless rim includes elongate apertures defined through an inner part thereof and each spoke has an elongate head which is inserted through the aperture and rotated 90 degrees so as to fix the head in a groove in a back of the inner part of the rim.