Take the wheel out, hold it by the axle and spin.
If the bearings feel tight, check the pre-load.
If the bearings rumble, replace them.
Since @Heldring's hub is a dyno hub, the bearings will always feel tight due to the notching created by the magnetic field.
@Emyr started
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Take the wheel out, hold it by the axle and spin.
If the bearings feel tight, check the pre-load.
If the bearings rumble, replace them.