A wheel made of a special alloy; especially one on a motor vehicle, typically made of an alloy of aluminium or (formerly) magnesium; usually in plural.
Origin
Early 20th century.
Definition of alloy wheel in US English:
alloy wheel
noun
A wheel made of a special alloy; especially one on a motor vehicle, typically made of an alloy of aluminium or (formerly) magnesium; usually in plural.