motorcycle inner tube Natural&butyl rubber Pulling strengh 8-9MPA Elongation rate:480%-500% ISO,DOT,CCC,MARK motorcycle inner tube OEMGreater strength and more durabilityGood price with ensured qualityCIQ,ISO,CCC,SONCAP,E-MARKDetials:1.Tension strength between 8-9MPA is available2.Raw material: natural rubber and butyl rubber;elongation rate:480%-500%;28%---45% rubber content.3.factory supplier ...