... our own factory, build in 2000.We have more than 12-years’ experience in this field.3. Prompt Delivery time ... 14, 3.00-10 ,4.00-10 , 4.00-12 ,4.00-8 ,3.00-10 , 3.50-8 ... , 3.00-25 ,4.50-12 , 3.00-8 ,90/90-18 ,3.00-12 , 16x2.125 ,3.50-5 ... ,16x6.50-8 ,13x5.00-6 , 12 1/2 x 2 1/2 , 315x55 , 110/50 ... -6.5 ,2.50-8 ,12 1/2 x 1.75 , 9 x 3.50-4 ... -4 ,3.00-4 , and so on durable bicycle inner tube