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Significance and Use
4.1 Test Methods , , , and can be used to evaluate different aspects of fatigue and weather cracking resistance of sidewall component materials in the form of test specimens. The present method applies to complete tires that are subjected to actual weather exposure conditions. The present method is satisfactory for research and development purposes but is not applicable to regulatory statutes or purchase specifications until standard classifications of state of cracking, similar to those in Test Method , can be established.
1.1 This test method covers procedures for evaluating passenger car tires for sidewall component integrity and cracking resistance, using an outdoor roadwheel.
1.2 This test method evaluates the resistance of tire sidewalls to dynamic weathering, atmospheric ozone cracking, fatigue cracking, or openings of splices within, or of junctures between, sidewall components and cracking at molded sidewall elements.
1.3 This test method is useful for evaluating tire black sidewalls, white, or other colored, sidewalls, and coverstrips.
1.4 This test method is limited to comparative performance testing between a “control” sidewall component or assembly and one or more experimental alternatives that are built onto the same tire (“multisection”) or onto tires that are identical in all respects other than the sidewall variation.
1.5 This test method is not applicable to evaluation of sidewall resistance to abrasion, as may be experienced in severe cornering or curb scuffing.
1.6 The values stated in SI units are to be regarded as the standard.
1.7 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. For specific precaution statements, see .
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D518 Test Method for Rubber Deterioration--Surface Cracking
D1149 Test Methods for Rubber Deterioration--Cracking in an Ozone Controlled Environment
D1171 Test Method for Rubber Deterioration--Surface Ozone Cracking Outdoors or Chamber (Triangular Specimens)
D3395 Test Methods for Rubber Deterioration--Dynamic Ozone Cracking in a Chamber
F538 Terminology Relating to the Characteristics and Performance of Tires
ICS Number Code 83.160.10 (Road vehicle tyres)
UNSPSC Code 25172500(Tires and tire tubes)
ASTM F724-94a(2016), Standard Test Method for Outdoor Evaluation of Tire Sidewall Component Cracking Resistance, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top