Patent ID: 7029073

Claim:
A lightweight wheel rim adapted to be connected to a hub by a plurality of spoke units, each of which includes a steel rod and a steel locking head that are interconnected, said lightweight wheel rim comprising: a pair of annular left and right side walls, each of which has a radial inner end; an annular inner wall disposed between said radial inner ends of said left and right side walls; and a pair of annular left and right angle elements disposed respectively at two opposite sides of said inner wall and formed integrally with said inner wall and said left and right side walls, each of said left and right angle elements having two opposite sides formed respectively and integrally with said inner wall and said radial inner end of a corresponding one of said left and right side walls, and a plurality of alternately arranged mounting portions and dented portions, each of said mounting portions of said left and right angle elements having a mounting hole that is formed therethrough and that is adapted to mount a respective one of the locking heads therein, each of said dented portions of said left angle element being dented toward said right side wall in a direction that is inclined relative to a radial direction of the hub, each of said dented portions of said right angle element being dented toward said left side wall in a direction that is inclined relative to the radial direction of the hub, each of said mounting holes in said left angle element being disposed between two adjacent ones of said mounting holes in said right angle element along a circumferential direction of the hub.