标准摘要
[中文适用范围]： 给出了轮毂和飞轮的主要尺寸，包括单速过山车制动轮毂和多速齿轮轮毂，以确保装配和互换性。 [外文原描述]： Gives the main dimensions for hubs and freewheels, including single-speed coaster brake hubs and multispeed gear hubs, to ensure assembly and interchangeability.
英文名称Cycles — Hubs and freewheels — Assembly dimensions