... inner tube ModelweightRubber contentPulling strengthTensile strengthAir valve 20*1.95/2.125 240g15%~55%9Mpa-10Mpa380%-550%TR1 About Product:1.tension ... size are available :Tyre and inner tube :2.25-17 ,2.50-17 ,2.75-17 ,2.50-18 ,3.00-18 ,3.25 ... .50-8 ,3.25-16 , 2.75-21 ,3.50-17 ,3.50-16 ,90/90-18 ,110/90-16 , 130/90-15 , 4 ... , 3.00-8 ,90/90-18 ,3.00-12 , 16x2.125 ,3.50-5,16x6.50-8 ,13x5.00-6 , 12 ...