ASTM_F_2872_-_11.pdf

Designation:F287211Standard Specification for225/75R16C 116/114S M+S Radial Light Truck StandardReference Test Tire1This standard is issued under the fixed designation F2872;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 specification covers the general requirements forthe 225/75R16C 116/114S radial light truck(or European lightduty vehicle)standard reference test tire.The tire covered bythis specification is primarily for use as a reference tire forbraking traction,snow traction,and wear performance evalu-ations,but may also be used for other evaluations,such aspavement roughness,noise,or other tests that require areference tire.1.1.1 Other standard reference test tires are also used forthese purposes and are referenced in Section 2.1.2 This specification provides a 16.0 rim diameter codestandard tire design and construction,standard dimensions,andspecifies the conditions of storage.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.1.4 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:2D412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD2240 Test Method for Rubber PropertyDurometer Hard-nessD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsE867 Terminology Relating to Vehicle-Pavement SystemsE1136 Specification for P195/75R14 Radial Standard Refer-ence Test TireF538 Terminology Relating to the Characteristics and Per-formance of TiresF2493 Specification for P225/60R16 97S Radial StandardReference Test TireF2870 Specification for 315/70R22.5 154/150L RadialTruck Standard Reference Test TireF2871 Specification for 245/70R19.5 136/134M RadialTruck Standard Reference Test Tire3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this specification,referto Terminology F538.3.1.2 pavement characteristic,nphysical feature or prop-erty of a pavement surface such as type,roughness,texture,and skid resistance.E8673.1.3 pitch,nunit of tread pattern elements used in variouscombinations to obtain optimum noise levels.F5383.1.4 standard reference test tire,SRTT,ntire that is usedas a control tire or surface-monitoring tire(for example,Specifications E1136,F2493,F2870,F2871,and F2872 tires).F5384.Design and Construction4.1 The 225/75R16C 116/114S standard reference test tireshall feature the steel-belted radial technology,see Fig.1 andFig.2,with technology as described in Sections 5-7.4.2 The tire shall be designed to conform to the EuropeanTyre and Rim Technical Organisation(ETRTO)dimensions1This specification is under the jurisdiction of ASTM Committee F09 on Tiresand is the direct responsibility of Subcommittee F09.20 on Vehicular Testing.Current edition approved Jan.1,2011.Published March 2011.DOI:10.1520/F2872-11.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 and tolerances for cross section and overall diameter found inthe current ETRTO Standards Manual.34.3 The tire used for this specification is produced byManufacture Francaise des Pneumatiques Michelin.4The tire isstamped on the sidewall with the words:“Standard ReferenceTest Tire”and“F2872”.5.Materials and Manufacture5.1 The individual standard reference test tires shall con-form to the manufacturers design standards.5.2 Tread compound,fabric processing,and all the steps intire manufacturing shall be controlled to ensure minimumvariability between tires.5.3 The standard reference test tire shall be as originallymolded without any tread grinding or repairs.5.4 Since the formulation for tread compounds are propri-etary,they shall be controlled by means of their physicalproperties given in Table 1.5.5 Dimensions,weights,and permissible variations aregiven in Section 7.5.6 The tire shall be of the following construction:5.6.1 Two-ply sidewall construction(polyester).5.6.2 A five-ply tread construction(two-ply polyester andthree steel belts).5.6.3 Black sidewall.6.Physical Properties6.1 The physical properties of the tread compound are listedin Table 1.7.Dimensions,Weights,a