6 quizzes on kart hubs, you can't get even one wrong!

That magnesium hubs are preferable to aluminium hubs because they maintain more constant tyre pressures and consequently decrease the risk of them getting too high is now a consolidated certainty. In fact, thanks to its properties, magnesium is a material that dissipates heat more effectively. Therefore, it is used especially in conditions requiring high levels of grip or high temperatures, guided by the objective of "freeing" the kart as much as possible in order to avoid it remaining too "stuck" and "tied" to the asphalt ( with a consequent decrease in smoothness and speed on the track, editor's note). It is therefore a question purely related to the material, as in the case of rims. In cold weather, as well as when it rains, aluminium rims and hubs can work better because if they get a little warmer, they maintain a higher temperature and, unlike magnesium rims and hubs, they don't dissipate that heat as quickly which allows tyres to "work" in the right temperature range. However, these are conditions that occur with reduced frequency over the course of a season in international championships, so much so that magnesium hubs are used 80% of the year. It is no coincidence that 90% of the hubs produced by manufacturers are made of magnesium, because the technicians have understood the potential of this material.