本国际标准规定了测量滚动周长和单位转数的方法 用于摩托车和轻便摩托车的新轮胎在负载条件下的距离（千米）。值 根据该方法获得的结果不打算用作性能或质量水平。 本国际标准适用于所有摩托车和轻便摩托车轮胎 路 注:由于摩托车上的大多数速度计和里程表都是从前轮启动的，因此测试轮胎将大量掉落 尺寸适合前轮使用。但是，也可以接受对后轮胎进行测量。

This International Standard specifies a method for measuring the rolling circumference and revolutions per unit distance (kilometre) for new tyres, under loaded conditions, made for use on motorcycles and mopeds. The values obtained according to this method are not intended for use as levels of performance or quality. This International Standard is applicable to all motorcycle and moped tyres designed and intended for use on the road. NOTE Since most speedometers and odometers on motorcycles are activated from the front wheel, the test tyres will largely fall into sizes applicable for front wheel use. However, it is accepted that rear tyres will also be measured.