I replaced all 5 wheel bearings less than 5000 miles ago. The wheels are out for re coating at the mo and I've found that the sprocket hub bearing is distinctly rougher to rotate by finger. I put this down to the cush drive rubbers being worn and allowing the sprocket hub, and bearing, to be pulled / stressed by the chain out of line, (not precisely 90.00 degrees to the axle), whilst under drive forces .

The over-tight axle nut / duff spacer / crushing the race is an interesting thought . I better check that manual for torque settings in future.

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I have a lot of growing up to do. I realized that the other day inside my fort.