Handbuilt wheel problem
I have a couple of sets of low spoke race wheels that I keep for racing only. I like to train on my Handbuilt Open Pros/Ultegra/DT Double butted spokes. Recently I cannot keep the rear from going out of lateral true slightly. (the front is always fine) I need to re-true it after every ride ! It doesnt go massively out of lateral true but every ride its 3-5mm out, I like it to run really true so its annoying to have to get my spoke key out after every ride. Amazingly my so called fragile race wheels with 16 spokes never go out of true even on the same roads.
So I am confused as to what I am doing wrong. I am usually pretty good at looking after my wheels. All the spokes seem to be of comparable tensions, with what I perceive to be the right "note" coming from drive side and "non drive" side and the dishing seems ok, I always de stress the spokes after trueing them as well. Anyone got any suggestions ? Like I say it cant be any thing hugely wrong because they only go out of true by a few mm never any worse. I put a quater turn on all the spokes recently in case they were all a bit low on tension, but the same thing happened. Should I have them rebuilt ?