ASTM_F_1502_-_05_2016.pdf

Designation:F150205(Reapproved 2016)Standard Test Method forStatic Measurements on Tires for Passenger Cars,LightTrucks,and Medium Duty Vehicles1This standard is issued under the fixed designation F1502;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers methods for performing certainmechanical static measurements on tires.The term“static”implies that the tire is not rotating while measurements arebeing made.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D2240 Test Method for Rubber PropertyDurometer Hard-nessF421 Test Method for Measuring Groove and Void Depth inPassenger Car TiresF538 Terminology Relating to the Characteristics and Per-formance of TiresF870 Practice for Tread Footprints of Passenger Car TiresGroove Area Fraction and Dimensional MeasurementsF1082 Practice for TiresDetermining Precision for TestMethod Standards(Withdrawn 2005)33.Terminology3.1 Definitions:3.1.1 outside diameter,nthe maximum diameter of a tirewhen it is mounted and inflated.3.1.2 overall width,nthe maximum cross-sectional widthof a tire,including protective or decorative ribs.3.1.3 tire weight,nthe weight of an unmounted tirewithout tube or flap.3.1.4 tread arc width,nthe length of the arc measuredfrom one extreme of the tread design proper to the oppositeextreme;that is,from shoulder to shoulder perpendicular to thecircumferential center line.3.1.5 tread hardness,nthe hardness of an element in thetread design as measured by a designated standard gage.3.1.6 tread radius,nthe radius of a circle whose arc bestfits the tread surface when the radius template used is heldperpendicular to the circumferential center line of an inflatedtire.3.2 For additional definitions of terms used in this testmethod,refer to Terminology F538.4.Significance and Use4.1 Static measurements of tires are important to tiremanufacturers,processing engineers,and vehicle design engi-neers for purposes of commerce(in consumer/vendor agree-ments)and in tire research and development.4.2 The procedures are sufficiently detailed to achievecommercially acceptable reproducibility among laboratoriesand may therefore be used for specification,compliance,orreference purposes.4.3 Changes attributable to growth after inflation may beobtained by comparing measurements made immediately afterinflation with those made 18 to 24 h later.5.Tire Marking5.1 For measurements other than weight,the tire shall bemarked at six equally spaced locations around the circumfer-ence.Starting at the DOT serial,make radial lines from bead tobead,perpendicular to the tread center line,at 60-degreeintervals.Number the resulting sections“1”through“6”in aclockwise sequence as viewed from the side containing theserial number.1This test method is under the jurisdiction of ASTM Committee F09 on Tiresand is the direct responsibility of Subcommittee F09.30 on Laboratory(Non-Vehicular)Testing.Current edition approved Jan.1,2016.Published February 2016.Originallyapproved in 1994.Last previous edition approved in 2010 as F1502 05(2010).DOI:10.1520/F1502-05R16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Procedures6.1 Tire Weight:6.1.1 Weigh the test tire on a scale with accuracy to 0.045 kg(0.1 lb)in the required range.A scale of 0-90 kg(0-200 lb)hasbeen found to be satisfactory for tires within the scope of thistest method.6.1.2 The scale used should be calibrated with weightstraceable to the National Institute of Standards Technology(NIST).6.2 Outside Diameter:6.2.1 Mount the test tire on a rim of the correct diameter forthe tire size and the measuring rim width listed for that tire inthe current yearbook of the Tire and Rim Association4(orapplicable document5,6),unless another width is chosen.6.2.2 Inflate the tire to the maximum pressure given on thesidewall unless another pressure has been chosen.Do notexceed the maximum pressure given on the sidewall.Recordthe value used.Allow 24 h for inflation growth and adjustpressure if necessary.6.2.3 The assembly of