Plastic or Metal wheels for distribution,  power and dry type transformers support to move transformers from where to somewhere. Weight’s capacity starts with 2 tonnes and up to 500 tonnes. PA6 reinforced plastic technology is still limited up to 100 tonnes. Generaly,  special combinations of steel casted materials are developed for mechanical strenght for both plastic and metal wheels. And for the metal carcass, painting with several RAL based color in accordance with electrostatic wet or dry technic, hot dip galvanized and zinc plating are suitable. Due to your special required products,  one directional or bidirectional structure can be designed.