1.1本试验方法描述了测量乘用车轮胎凹槽和空隙深度的标准程序。 1.2可以使用任何能够测量槽（空隙）深度的机械、光学或电子设备，但此处仅描述接触方法。非接触方法超出了本试验方法的范围。 1.3以英寸-磅为单位的数值应视为标准值。括号中给出的值仅供参考。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1凹槽（空隙）深度影响轮胎在各种操作环境中产生牵引力的能力。凹槽（空隙）深度还定义了轮胎的磨损状态，并用于确定磨损率。

1.1 This test method describes standard procedures for measuring the groove and void depth in passenger car tires. 1.2 Any mechanical, optical, or electronic device capable of measuring groove (void) depth can be used, but only the contact methodology is described here. Noncontact methodology is beyond the scope of this test method. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 The groove (void) depth affects the tire’s ability to develop tractive forces in various operating environments. Groove (void) depth also defines the state of wear of a tire and is used in the determination of the rate of wear.