本文件提供了安全、质量和性能要求的规范 附加抓地力装置，通常称为“SGD”，用于根据当前标准认证的轮胎类型 法规，拟安装在M1、N1、O1、O2及相关子类别车辆的轮胎上 （越野车）。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document provides specifications for safety, quality and performance requirements for supplementary grip devices, commonly called "SGDs", for type - approved tyres according to the current legislation, intended to be fitted on tyres on vehicles in categories M1, N1, O1, O2 and relevant subcategories (off road vehicles).All current amendments available at time of purchase are included with the purchase of this document.