Gen I busa rim composition

I am rather certain they are cast aluminum , like almost all stock wheels that are not cruiser-spoke type wheels .
 
Fun exercise... I came to the same conclusion (cast aluminum) by process of elimination:

You can't make a 1 piece wheel from spun aluminum.

Machined aluminum would be very cost prohibitive for an OEM part.

Cast iron wheels would weigh 50 lbs each... like spooning tires on a pair of dutch ovens.

Stamped steel and welded (or riveted) wheels are so... 1970's.

Yep... cast aluminum.

Is anyone else bored at work today?
 
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