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So the toothed ring has a spring between it and the freehub body. This engages and disengages with the teeth in the hub body. So everything locks together when you pedal and clicks away when you stop. It's a proper low pitched grumble of a click though, sounds mean. Love it.
Edit: beaten to it with a better explanation. But the teeth in the hub body aren't sprung. They're static teeth in the body for mavic.
How do they engage/disengage? Are they all sprung or something?