1.1本规程描述了根据试验方法获得的基本磨损数据的基本线性回归分析 F421 练习F762。 1.2通过试验方法中所述的程序测量沟槽深度损失，获得基本磨损数据 F421 根据规程F762进行一系列试验循环（规定条件下的试验距离）后。 1.3对平均轮胎花纹深度与安装测试轮胎的测试车辆行驶的测试距离之间的关系进行线性回归分析。根据该分析确定磨损率: 每单位距离的槽深度损失。 1.4线性磨损定义为磨合后基本恒定的磨损率，当获得测量间隔数n至少为3的数据集时，其导致线性回归确定系数R2等于或大于0.95。每个测量间隔代表一个特定的测试距离。 1.5本规程不适用于非线性或不规则胎面磨损轮胎的胎面寿命预测。 1.6给出了SI和英寸磅单位的评估参数； 两者均可使用。定义的评估参数是轮胎测试行业中通常使用的参数，没有特别声明这些参数和术语相对于可能开发的其他术语和参数的优越性。

1.1 This practice describes the elementary linear regression analysis of basic treadwear data as obtained according to Test Method F421 and Practice F762. 1.2 The basic treadwear data are obtained as groove depth loss measurements by procedures described in Test Method F421 after a series of test cycles (test distances under specified conditions) according to Practice F762. 1.3 A linear regression analysis is performed for the relationship between average tire tread depth and the test distance traveled by the test vehicle, on which the test tires are mounted. From this analysis a rate of wear is determined: groove depth loss per unit distance. 1.4 Linear treadwear is defined as an essentially constant rate of wear, after break-in, which results in a linear regression coefficient of determination, R2, equal to or greater than 0.95 when obtained for a data set where the number of measurement intervals, n, is at least 3. Each measurement interval represents a specific test distance. 1.5 This practice is not applicable to the prediction of treadlife for tires that exhibit non-linear or irregular treadwear. 1.6 Evaluation parameters are given for both SI and inch-pound units; either may be used. The evaluation parameters as defined are ones typically used in the tire testing industry and no special claim is made for superiority of these parameters and terms over other terms and parameters that may be developed.