As Mike mentioned unless you have a pretty good sized rig it is hard to get these big un's home. I have stripped them in place and cut them in half (see pictures).
Then had the challenge on a couple of just getting rid of the old flat tires.
http://www.flickr.com/photos/advance-design_parts_co/8130556366/in/set-72157631870734114
http://www.flickr.com/photos/advance-design_parts_co/8130555128/in/set-72157631870734114
http://www.flickr.com/photos/advance-design_parts_co/8130524881/in/set-72157631870734114
http://www.flickr.com/photos/advance-design_parts_co/8130523311/in/set-72157631870734114