... (1) Name: rubber wheel(2) Color: Black ,red, yellow ,green ,gray(3) Bearing: Ball, roller, nylon or without bearing(4) ... Type: Solid, pneumatic, PU foam, semi-pneumatic, hollow etc.(5) Material of tire: Our rubber wheel ... rub resistance, natural rubber tire and steel rim make sturdy wheel.(6) Material of rim: Steel or plastic.(7) Use ... 8, 5.00-6, 6.50-8 rubber wheel 4.80/4.00-8