What material are chrome rims composed of?

Answer 1

chrome rims are made of steel
the steel is then cleaned and polished and subjected to a chemical process that makes the chrome
if you find an old chrome rim u can see where rocks etc have chipped the chrome off an that allows rust to get at steel rim

Answer 2

Chrome rims are typically composed of aluminum alloy as the base material. The chrome plating process involves electroplating multiple layers of chromium onto the aluminum surface to provide the shiny and durable finish.