1,Natural inner tube 2,Valve:TR13,Weight:1.0kgs 3,Tensile strength:6 ... ,Elongation rate:400%,450%,500% We can produce the inner tube( natural rubber and butyl rubber) for motorcycles. Cars ... price &quickly delivery time.We can produce the inner tube according to customer's requirementOther size:SizeValve12.00-24TR179A12 ... 8TR87/TR13Please contact me for further information. inner tube 175/185-13 TR13