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Alloy wheels - what exactly are they made of?

921 views 6 replies 4 participants last post by  cgalpin 
#1 ·
Just curious.

And is the surface color just a coating? It looks like it to me on this rim for example. Where they have rubbed they go a dull light grey color - almost looks like plastic.

And yes that would be air you see bubbling out of the bead - I hate mud!

Follow-up Post:

On second thoughts maybe the light grey is a primer?
 

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