... airtightness motorcycle inner tube ModelweightRubber contentPulling strengthTensile strengthAir valve 2.75-18 440g15%~55%9Mpa-10Mpa380%-550%TR4 About Product: ... inner tube :2.25-17 ,2.50-17 ,2.75-17 ,2.50-18 ,3.00-18 ,3.25-18 ,2.50-14 ,2.75-18 ,3.00- ... 17 , 3.25-17 ,3.50-10 ,2 ... 00-6 , 12 1/2 x 2 1/2 , 315x55 , 110/50-6.5 ,2.50-8 ,12 1/2 x 1.75 , ...