i got this wheel in a package deal with a vintage 70's springer front end i bought. what you will notice that it has a very unique hub. unfortunatly i didnt get an axle with this wheel. i am looking to everyone here to find out something about this wheel. i work in the motorcycle field and have tapped my resources with all the gurus that i know and no one has even seen such a thing let alone know anything about it. if thats not enough in the middle of the hub is a spring but both sides of the hex move in unison. thanks to any input anyone has.