Check out the trick way you access the tire valve on this BMW Alpina B6
By rotating the Alpina roundel and unlocking the center hub, you get access to the tire valve and bolts, which are hidden inside. They're literally kept under lock and key, and they protect your Alpina's wheels from the elements and theft. This unique center-fill system employing a hollow spoke isn't a new setup for the favored BMW tuner, but since Autoblog had one in our offices this week, we thought we'd take the opportunity to show you how the technology works if you haven't seen it in action before. Check it out in the video below.
BMW 650 Gran Coupe Information
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