ASTM_F_2793_-_14.pdf

Designation:F279314Standard Specification forBicycle Grips1This standard is issued under the fixed designation F2793;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.INTRODUCTIONThis specification defines a set of physical characteristics for Bicycle Grips and End Closures.Oneintent of this specification is to define certain dimensions of Bicycle Grips and End Closures appliedto tubular handlebars mounted on bicycles designed for cyclists who are 12 years of age or younger.The second intent of this specification is to test the durability of the ends of the Bicycle Grips and EndClosures for all bicycles where the tubular handlebar end axes are oriented within 60 of parallel tothe axle axis of the steering wheel.This second intent would apply to the“BMX”and“Mountain”style tubular handlebar examples illustrated in Fig.1,and does not apply to the“Drop”(also knownas road race)style shown in the same figure.1.Scope1.1 This specification establishes a minimum outer diameterfor the Bicycle Grip or End Closure,and the method fordetermining if the grip or End Closure meets the diameter.1.2 This specification checks the following characteristics:1.2.1 Bicycle Grip outer diameter,1.2.2 Bicycle Grip or End Closure diameter or both,and1.2.3 Bicycle Grip or End Closure retention or both.1.3 This specification establishes testing requirements forthe durability of Bicycle Grips and End Closures.It representsa performance standard and is not intended to dictate thedesign,materials,or construction of those closures.1.4 UnitsThe values stated in SI units are to be regardedas the standard.The values in parentheses are for informationonly.1.5 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:2F2043 Classification for Bicycle Usage2.2 Other Standards:3SAE J526:2000 Welded Low-Carbon Steel Tubing3.Terminology3.1 The term bicycle is defined in Classification F2043.3.2 Definitions of Terms Specific to This Standard:3.2.1 bicycle grip,nparts on the handlebar that are meantto be grasped to allow for control and comfort while steeringand operating the bicycle.3.2.1.1 DiscussionThe Bicycle Grip may or may notinclude a portion or all of the End Closure(see end closure).3.2.2 bicycle leg maximum,na distance measured fromcrank rotation axis to the top center of the seat,with the seatpositioned at the bicycle manufacturers maximum allowedseat adjustment away from the crank axis,Fig.2.3.2.3 end closure,nend cap,fitting,grip,device,orcombination of parts intended to close the end of a tubularbicycle handlebar,Fig.3.3.2.4 grip diameter,ndiameter of the Bicycle Grip wherethe hand is placed for normal riding.3.2.5 grip end diameter,ndiameter of the Bicycle Gripend(largest diameter within 40 mm of the handlebar end).3.2.6 handlebar coupon,nwelded cold-drawn SAE 1018steel tube with deburred edges,used to imitate a handlebar inthe End Closure punch-out test,Fig.4.Material shall meetSAE J526 specifications.1This test method is under the jurisdiction of ASTM Committee F08 on SportsEquipment,Playing Surfaces,and Facilities and is the direct responsibility ofSubcommittee F08.10 on Bicycles.Current edition approved Sept.1,2014.Published September 2014.DOI:10.1520/F2793-14.2For 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.3Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096-0001,http:/aerospace.sae.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.7 OEM bar,nthe original equipment manufacturer(OEM)handlebar as supplied,or as specified,with a completebicycle intended to be used with the Bicycle Grip or EndClosure,or both.3.2.8 punch out,vwhen a handlebar penetrates the EndClosure exposing the end of a tubular bicycle handlebar.FIG.1 Some Examples of Tubular Handlebar StylesFIG.2 Bicycle Leg MaximumF2793 142 3.2.9 side extending handlebar,na tubular handlebarframe whose tube axis at the location of the Bicycle Grip orEnd Closure,is oriented within a conical region,60 of parallelto the direction defined by the axle axis of the steering wheel,when properly mounted on the bicycle.3.2.10 smooth,adjfree from burrs,abrupt indentations,orsharp edges.4.Performance Requirements4.1 The following performance requirements are for BicycleGrips and End Closures to be installed on a Side Extend