so my Cane Creek headset has a spring betwen the top cap and 'star nut' (although this is more like a hope head doctor), never seen this before, anyone know if this is just specific to carbon steerer tubes? i assume its to stop the star nut equivalent from pulling back up the tube?
Never seen one - might it be to keep the "expandy" bit of the plug under some tension & hold it in the right position until you actually tension the top-cap. I can't believe it'll offer enough force to stop it pulling back up
not sure, the expandy bit is firmly in place without it. its an odd one!
The one on my px carbon road bike also has a spring. Not seen one before.
think it must just provide enough tension to set the expanding nut. ill leave it in
Never seen one before, but it belongs to the expander ( http://www.vpcomponents.com/product/m-7xl/ ), rather than the headset. It's there to prevent it from just spinning until it expands enough to bite into the steerer.
