Originally Posted by
jimmuller
You can usually hear something rattling or buzzing, but this was quiet. If something distorts a plain harmonic oscillation it typically modifies the waveform to produce harmonic partials with frequencies which are integer multiples of the fundamental.
Still it looks like rattle to me. Not that rattle when the wheel is ready to drop, but still rattle.
If you have time on your hands you can compare compliances of the front and the back (in mm per kg in left-right direction without a wheel). It's easy and you will have something meaningful to compare. I do it for some years.
It's interesting what you are doing. Thanks from nerds.