Composite rim for a bicycle wheel

A composite rim for a bicycle wheel generally includes a radially outer tire-engaging portion (50), a radially inner spoke-engaging portion (52) and first and second sidewalls (54,56). The second sidewall (56) is spaced apart from the first sidewall (54). The first and second sidewalls (54,56) extend between the tire engaging and spoke-engaging portions (50,52). The rim includes at least one through-hole (53) and a pattern of through-thickness stitching reinforcement (84) at the through-hole (53). The tire-engaging and spoke-engaging portions (50,52) and first and second sidewalls (54,56) form a toroid.