... competitive price (1) Name: rubber wheel(2) Color: Black ,red, yellow ,green ,gray(3) Bearing: Ball, roller, nylon ... , hollow etc.(5) Material of tire: Our rubber wheel has high natural rubber rate, high elasticity, rub resistance ... , natural rubber tire and steel rim make sturdy wheel.(6) Material of rim: Steel or plastic.(7) ... 3.00-4, 3.50-4, 4.10/3.50-4, 3.00-8, 3.25/3.00-8, 3.50-6, 3.50-7, 3 ...