本SAE推荐实施规程提供了轮胎尺寸和统一实验室试验程序，用于评估主要用于卡车、公共汽车、拖车和多用途乘用车的公路用新型充气轮胎的某些基本特性。（本SAE推荐实施规程中发布的要求和试验程序与美国目前用于载重汽车、客车、挂车和多用途乘用车的轮胎尺寸有关。有关未列出的轮胎尺寸的相关信息，请联系美国汽车工程师学会底特律分会，地址:密歇根州东底特律东八英里路18121号，邮编:48021。）

This SAE Recommended Practice provides tire dimensions and uniform laboratory test procedures for evaluating certain essential characteristics of new pneumatic tires intended primarily for highway use on trucks, buses, trailers, and multipurpose passenger vehicles. (The requirements and test procedures published in this SAE recommended practice pertain to tire sizes currently used in the United states on trucks, buses, trailers, and multipurpose passenger vehicles. For related information on tire sizes not listed, contact Society of automotive Engineers, Inc., Detroit Branch Office, 18121 East eight Mile road, East Detroit, Michigan 48021.)