... .rubber wheel 2. Solid, pneumatic, PU 3. good quality and extremely competitive price (1) Name: rubber wheel(2) Color: Black ,red, yellow ,green ,gray(3 ... bearing(4) Type: Solid, pneumatic, PU foam, semi-pneumatic, hollow etc.(5) Material of tire: Our rubber wheel has high natural rubber rate ... : 200x50, 2.50-4, 2.50-8, 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, 3.50-8, 4.00 ...