Thread: BMW Lightweight Springs and Brakes to Reduce Weight of Future Models
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      04-12-2011, 06:48 PM   #10
JimB_328XI
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Drives: 328XI
Join Date: Nov 2006
Location: Boston, MA

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Originally Posted by maxnix View Post
What is the filler in the wheel? Looks like sand so I wonder if it is structural.
Cork. Feels lighter on wet roads.
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