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butyl bike tube 1.A/V, E/V, F/V, G/V, I/V TR4 valves 2. good service 3.ISO&CCC 4.delivery date :15-20days butyl biketube we take this opportunity to introduce ourselves that we are a professional manufacturerestablished in1998and specialising in produce bicycle tires and tubes. more than 10 years of expreience to export to about 40 countries and areas. For bicycle tire , we can produce normal bicycle tire, color bicycle tire and electric bicycle tire For bicycle tube , we have natural rubber tubes and butyl tube with A/V, E/V, F/V, I/V, G/V, TR4 valves etc. As follows are the available sizes for your selection. BICYCLE TUBE SIZES 28x1 1/214x1.75/2.12526x1 3/812x1.75/2.12524x1 3/826x2x1 3/426x2.12520x2x1 3/424x2.12528x1.7522x2.12528x1 5/8x 1 3/8 (700X35C)20x2.12527X1 1/418x2.125700X23C16x2.12526X1 1/2 X1 5/812x2.12526X1.5026x1.75/2.12524X1.5024x1.75/2.12526X2 1/222x1.75/2.12513X2 1/220x1.75/2.12518X2 1/218x1.75/2.12516x1.75/2.125