Bicycle wheel rim has annular walls extending from pair of lateral walls of outer metal portion, which includes thick central portion and lateral edge portion arranged along lateral direction of central portion

摘要

#CMT# #/CMT# The wheel rim has outer metal portion (2) and inner non-metal portion (3) fixedly attached to outer metal portion. The metal portion includes pair of lateral walls (4) and annular walls (5) extending from walls (4). The walls (5) includes thick central portion (5a) and lateral edge portion (5b) arranged along lateral direction of central portion. #CMT#USE : #/CMT# Bicycle wheel rim. #CMT#ADVANTAGE : #/CMT# The mechanical strength of bicycle wheel rim can be improved with reduced weight. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a sectional view of the bicycle wheel rim. 2 : Outer metal portion 3 : Inner non-metal portion 4 : Lateral wall 5 : Annular wall 5a : Thick central portion 5b : Lateral edge portion.