# Transcript

Dr. Keith Martin, The Open University

Another crucial difference from the hub is that the tub is subject to a range of mandatory safety regulations and tests, which apply to all teams’ cars. Thus, apart from carrying the working loads, there are some additional worst cases in the form of practical tests. Such tests are vital in assessing performance and harnessing data on the properties of the material used, one reason being that the material properties are not quite as easy to determine as are the hub’s steel properties.