1.New technology 2.New formula 3.New structure 4.heat-resisting, aging resistance 5.Highly Tear Resistant, high airtightness motorcycle inner tube ModelweightRubber ... ,3.00-17 , 3.25-17 ,3.50-10 ,2.25-14, 3.00-10 ,4.00-10 , 4.00-12 ,4.00-8 ,3.00-10 , 3.50 ... /2 x 1.75 , 9 x 3.50-4 , 2.50-10 ,3.50-6 ,3.50-4 ,3.00-4 , and so on top quality motorcycle ...