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What causes it?
Friction between nipple and spoke
What can be done about it?
You can unwind it
How can it be prevented?
It can be minimised by lubricating the threads and reduced by using thicker spokes, but it can't be entirely prevented. Friction between male and female threads is the main mechanism by which a threaded fastener is prevented from loosening in service. If you could actually cut the friction to zero, which would be the only way to completely eliminate wind up, the spokes would immediately loosen to zero tension as soon as you let go of them :-)
Haven't searched and this may have been addressed already but I have a question about spoke wind up. What causes it? What can be done about it? How can it be prevented?
I usually lube the threads and the contact between nipple and rim but every now and again. Very annoying as it generally occurs towards the latter stages of a build when you've trued it and are reaching optimum tension when the creaking starts. Exactly when you need to do those micro turns you can't.
Adding extra lube (I generally use chain lube or linseed oil) and squeezing spokes to get better alignment helps a bit. Any thoughts or tips?