Actually strike that - the G3 isn't compatible with the Cervo.
If it's a G3 you'll need one of their newer head units - Joule or Joule 2. I didn't think they made G3 track hubs?
@hippy started
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If it's a G3 you'll need one of their newer head units - Joule or Joule 2. I didn't think they made G3 track hubs?