Bicycle crank arm apparatus, has axle mounting boss whose opening receives end portion of axle and fastener for tightening crank arm mounting boss around end portion of axle

摘要

The axle-mounting boss (304) provided axially to the inner side of axle bolt, has opening (308) for receiving end portion (350) of axle (59), and fastener for tightening crank arm mounting boss around the end portion of axle. Independent claims are also included for the following: (1) axle bolt; (2) tool for axle bolt; and (3) crank arm.