Motorcycles Pop Quiz

Magnesium makes for light, strong alloys, great for bike applications. But what meer practical reason is it not used for production motorcycle wheels?
Choose the right answer:
Option A It cannot be cast cheaply enough for motorcycle wheels.
Option B The ore is too costly.
Option C It's prone to burn extremely hot if abraded.
Option D Its alloys tend to be porous, causing tire deflation if paint is damaged.
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