ASTM F421 - 15

    Standard Test Method for Measuring Groove and Void Depth in Passenger Car Tires

    Active Standard ASTM F421 | Developed by Subcommittee: F09.30

    Book of Standards Volume: 09.02

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    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.

    1. Scope

    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 SI 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.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries

    F538 Terminology Relating to the Characteristics and Performance of Tires

    F1426 Practice for Identifying Tire Tread Surface Irregular Wear Patterns Resulting from Tire Use

    ICS Code

    ICS Number Code 83.160.10 (Road vehicle tyres)

    UNSPSC Code

    UNSPSC Code 25172500(Tires and tire tubes)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/F0421-15

    Citation Format

    ASTM F421-15, Standard Test Method for Measuring Groove and Void Depth in Passenger Car Tires, ASTM International, West Conshohocken, PA, 2015,

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