trailers for trailers see many bad roads, heavy loads and little service. So they should be reliable and durable without giving you problems at any time when you need a trailer. The market is mainly dominated by two variants - steel and aluminum discs to the trailer.
First of all, the choice depends on the type of trailer and its load capacity, as well as on your needs. But not worth discounting and properties of materials.
In addition, there are differences in robots and radius. Depending on your chosen axis for the trailers, you need to look the appropriate disks for the trailers. And the radius should be selected based on the desired tires and the sizes of the wings. Having determined these parameters, you can choose good products for you by color or shape, so you will definitely not make a mistake and will be satisfied with the purchase.