I know they're cast. I figured they were steel since they're pretty heavy, but today I was messing around with an extendable magnet trying to get a bolt that dropped behind my bumper cover. I put the magnet to the wheel, but it didn't stick. So are they cast aluminum? Sorry if this has an apparent answer and thanks ahead for any help.

And the wheels in question are the ones in my sig (277).

 

Yeah, alloy or aluminum-alloy. I have 278's.

 

I believe aluminum alloy. Like 25% aluminum 75% misc leftovers like screws, bolts, shavings, etc.

 

LOL