This International Standard specifies the dimensions and tolerances to ensure secure assembly between the stem and the handlebar centre of a bicycle.This International Standard is applicable for bicycles intended for use on public roads, and on which the saddle can be adjusted to provide a saddle height of 635 mm or more.This International Standard is not applicable for specialized types of bicycle, such as tradesmen’s delivery bicycles, tandems, toy bicycles and bicycles designed and equipped for use in sanctioned competitive events.