ISO 9129:2008规定了测定摩托车和摩托车/骑手组合惯性矩的测量方法。它适用于两轮摩托车。 如果证明结果相同，则可以使用其他测量方法。 仅通过ISO 9129:2008中描述的方法获得的测量结果不能用于车辆稳定性评估，因为它们只涉及这一非常复杂现象的一个方面。

ISO 9129:2008 specifies a measuring method for determining the moments of inertia of the motorcycle and of the motorcycle/rider combination. It applies to two-wheeled motorcycles. Other measuring methods can be used if it is demonstrated that the results are equivalent. Measurement results obtained exclusively by the method described in ISO 9129:2008 cannot be used for an evaluation of vehicle stability because they deal with only one aspect of this very complex phenomenon.