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ASTM F421-15(2021)

Current Reaffirmation

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

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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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


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.

SDO ASTM: ASTM International
Document Number F421
Publication Date April 1, 2021
Language en - English
Page Count 4
Revision Level 15(2021)
Supercedes
Committee F09.30
Publish Date Document Id Type View
June 1, 2015 F0421-15 Revision
Aug. 1, 2007 F0421-07 Revision
May 10, 2000 F0421-00 Revision
April 1, 2021 F0421-15R21 Reaffirmation
June 1, 2013 F0421-07R13E01 Reaffirmation