I recently sold my wheels and tires to a forum member and shipped them to him. I had never shipped complete wheels before so I did an internet search for tips and found the info below.
http://howtoshipwheels.com/
http://ls1tech.com/forums/wheels-tires/1410895-how-ship-rims-tires.html
http://howtoshipwheels.com/
http://ls1tech.com/forums/wheels-tires/1410895-how-ship-rims-tires.html