Rubber wheel:

Professional manufacturer in China;
Various sizes and types available;
Provide functionality at a reasonable price;
Pneumatic rubber Wheel/solid wheel;
OEM accepted.
 

ply rating: 2PR or 4PR;
Rim:steel or plastic. 
size available:
8*250-4, 200x50, 10*350-4, 10*410/350-4, 10*300-4, 400-4, 13*350-6, 13*300/325-8, 350-7, 13*400-6, 13*500-6, 14*350-8, 16*400-8, 15*600-6, 15*600-8, 16*400-8, 18*650-8 etc