Automobile wheels can be made of steel or light alloys.
Alloy wheels are automobile wheels which are made from aluminum or magnesium metal alloy. Alloy wheels differ from normal steel wheels, because of their lighter weight, which improves performance.
Alloy wheels are also better heat conductors than steel wheels which improves heat dissipation from the brakes, which reduces the chance of brake failure in more demanding driving conditions.
Alloy wheels are also considered more attractive than hubcaps. However alloy wheels are more expensive than standard wheels, and even though they are becoming more available than before, they are not standard on many cars.>