... inner tube ModelweightRubber contentPulling strengthTensile strengthAir valve3.00-8 300g15%~55%9Mpa-10Mpa380%-550%TR87 About Product: ... All size are available :Tyre and 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 ... 10 , 4.00-12 ,4.00-8 ,3.00-10 , 3.50-8 ,3.25-16 , 2.75-21 ,3. ... 10-18 ,3.00-23 , 3.00-25 ,4.50-12 , 3.00-8 ,90/90-18 ,3.00-12 , ...