Originally Posted by
HardyWeinberg
My wife's breezer has a shimano generator hub w/ solid axle. I have swapped out solid for hollow and vice versa on surly hubs, I don't know why specific dynamo hubs wouldn't allow that.
replacing the axle on any dynohub is either difficult or impossible. There are instructions floating around on how to do it for shimano hubs, but the procedure is quite involved and you risk breaking the wire that carries the current for the lights rendering the hub unusable for lighting