The Complete Guide to Alloy Wheels

Alloy wheels are constructed from aluminium, magnesium, or other lightweight metal alloys with around a third the density of steel, allowing for reduced weight while maintaining strength.

Yes, lighter alloy wheels reduce rotational mass, requiring less force for powertrains to get the wheels spinning.

Superior heat conduction in alloy metals combined with lower rotational inertia results in alloy wheels drawing to a halt more efficiently with less braking system heat buildup and shorter stopping distances.

Alloys used in wheels are highly resistant to corrosion caused by exposure to moisture, road salt, and winter precipitation, unlike steel wheels, which succumb to hidden rust issues over time.

Modular alloy wheel construction with replaceable barrel components allows minor scratches or scrapes to be remedied cost-effectively by replacing the external damaged piece rather than the whole wheel. 

Yes, a 10% decrease in wheel weight can increase fuel economy by about 2% over a vehicle's lifetime. The reduced rotational mass cuts mechanical drag. So even considering their higher cost, alloy wheels pay off in fuel savings.

Built-up brake dust, road grime and normal wear and tear can allow oxidation to take hold if wheels are not cared for properly. But regular cleaning and adding protective wax layers minimise corrosion risks.