I'm asking before I jump into it.  I have a flat bed trailer, looks homemade, with what looks like mobile home axles on it.  Open center rim with wedges on the studs to hold in place.  One of the studs is broken.  I know on a car or pickup you usually can just drive the bolt out and replace it.  (Good theory, sometimes works) Can I expect that on this hub?  Or do I need to start looking for a hub? 

With my luck even if it is made to drive out it's grown on place.