"Special alloys" refers to types of metal that are made by combining two or more different metals. These alloys have unique properties and characteristics that make them different from regular metals. Full definition
[27] Further styling touches were a special front bumper, blue gauge faces for the instrument cluster, [85] two special colours and special alloy wheels. (en.m.wikipedia.org)
The new Stormy edition comes with a range of unique features including special alloy wheels, unique paint colours and three ways of entering it. (sniffpetrol.com)
The Sport Line model highlights the dynamic character of the BMW 2 Series Active Tourer with special alloy wheels and sports seats. (bmwblog.com)