30cm PVC Balloon Wheel 1/2" Bushing with Twist Lock Knobs:
The unique wheels permit easy rolling of heavy loads over most terrains including softsand, dirt, mud, snow, or environmentally sensitive areas.The 30cm wheel has a maximum weight limit of 99 lbs. per wheel. It will get you over terrains that are not accessible to other wheels. The 30cm wheel is also available in rigid and swivel caster wheels.