Polyurethane on Aluminum Wheels are designed to roll easier and last longer than rubber on iron wheels. The polyurethane wheel tread is made out of high quality liquid cast polyurethane that is chemically bonded to the aluminum core to prevent any thread de-bonding. The aluminum wheel core is lighter weight than a cast iron wheel core and it will not rust. However, the aluminum wheel core can corrode when exposed to certain cleaners and solvents so it is not highly recommended in heavy wash down environments. This is a light-weight and ultra-durable wheel that has a very high strength to weight ratio. It is designed to have an extended lifespan under heavy loads. The aluminum wheel core has a strong metallic look which can make it more aesthetically pleasing than cast-iron core wheels. Polyurethane on Aluminum wheels come in both flat tread and crowned tread versions giving you the flexibility when using these in industrial applications and applications needing more of an ergonomic-specific design. Polyurethane on Aluminum Wheels offer abrasion resistance, oil, and chemical resistance and are non-marking helping you protect your floors. These wheels are very popular in applications such as Research Laboratories, Hospitals, Bakeries and many Industrial Manufacturing facilities. Many different bearing options are available in these wheels making them easy to customize for the application you are seeking a solution for. In addition to the bearing options, there are various different durometers you can specify when choosing a Polyurethane on Aluminum wheel. The options available are: 95 (+/-5) Shore A, 90(+/-5) Shore A , 85 (+/-5) Shore A and, 65 (+/-5) Shore D. Asking your local specialist can help you determine which durometer is right for your application.