Rim material: Plastic or metal
Bearing: Roller/Ball/Precision bearing
1)Solid polyurethane wheels are widely used for wheelobarrow,Lawn cart, hand trolley,etc.
2)It is more economy and enviromental than rubber wheels.
3)It is good in resillience and can be made in different colours.
4)It is light weight and durable
5)It is both heat and cold resistant amd excellent in elasticity.
6)It is resistant to water, oil, dirt, acid and alkali.