1.New technology 2.New formula 3.New structure 4.heat-resisting, aging resistance 5.Highly Tear Resistant, high airtightness ... ,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 ... x 2 1/2 , 315x55 , 110/50-6.5 ,2.50-8 ,12 1/2 x 1.75 , 9 x 3.50-4 , 2.50 ... -10 ,3.50-6 ,3.50-4 ,3.00-4 , and so on ...