[damselfly]

Originally Posted by DCM

It is all because when you tighten the wheels nuts, your trying to squeeze the two wheel bearings together, putting an axial load on them, hence why when you slacken the nut off, they free up. Like has been said above, you need to make a spacer to sit between the two bearings so that when you tighten up the nut, it doesn't put a side load on the bearing.

Looking into the hub there's already an inbuilt spacer, so I can't see anything making a difference.
I've placed a small teflon washer in between the pin and the bearing, and a teflon washer on the axle between the large e clip and bearing. This has made a minute bit of difference but it's still unsatisfactory.
How Ansmann overlooked this beggars belief.