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Description of ASTM-F1426 2020ASTM F1426-20Active Standard: Standard Practice for Identifying Tire Tread Surface Irregular Wear Patterns Resulting from Tire UseASTM F1426Scope 1.1 This practice provides the instructions and nomenclature to evaluate the wear features of the tread pattern on a tire for some intermediate state prior to wear out. 1.2 A tire may be characterized by certain worn tread pattern conditions that are collectively referred to as “irregular wear” features. Definitions for these features are given in a special logical and conceptual sequence. First, basic tread pattern definitions are given. Then, additional tread pattern definitions directly related to the basic tread pattern definitions are given. Understanding these secondary definitions requires the knowledge of the basic definitions. 1.3 Based on the terms of this developed system of tread pattern definitions or descriptions, a set of treadwear descriptions is presented that encompasses both regular wear and irregular wear features. 1.4 This hierarchical arrangement produces the accurate and concise definitions needed to evaluate the complex irregular wear conditions of tires. 1.5 See Fig. 1 for tread pattern features or characteristics. See Fig. 2 and Fig. 3 for typical illustrations of regular or uniform and irregular treadwear features. FIG. 1 Tread Pattern Characteristics FIG. 2 Uniform or Regular Wear FIG. 3 Types of Irregular Wear FIG. 3 Types of Irregular Wear (continued) FIG. 3 Types of Irregular Wear (continued) FIG. 3 Types of Irregular Wear (continued) FIG. 3 Types of Irregular Wear (continued) Note 1: Images courtesy of The Technology & Maintenance Council of the American Trucking Associations, reference Radial Tire Conditions Analysis Guide, Item # T0121. For more information, contact TMC: (703) 838-1763; tmc@trucking.org; http://tmc.trucking.org. Note 2: Images courtesy of the Tire Industry Association, reference Passenger and Light Truck Tire Conditions Manual, www.tireindustry.org. Note 3: In illustrations (h), (l), and (m), the ‘light’ or ‘featureless’ areas indicate high wear rate zones. Note 4: Images courtesy of the U.S. Tire Manufacturers Association, reference Care and Service of Passenger and Light Truck Tires Manual, www.ustires.org. 1.6 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. Keywords irregular wear; tire; tread pattern; tread surface; treadwear; wear pattern; ICS Code ICS Number Code 83.160.10 (Road vehicle tyres) DOI: 10.1520/F1426-20 The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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