Just want to repeat what gmc said about taking off the tires. Loosen all your nuts but leave the nuts on the lug a turn or two. Take a hammer and tap on the wedges until they pop free- you'll know when they do because they'll bang out against the nuts. If you take the nuts all the way off and just grab the tires and wiggle, like you would with pilot or budd type wheels, the stuck wedges will suddenly fly loose, hitting you somewhere between your shins and waist (depends how tall you are). It will make you walk funny for a while. After the wedges bang loose, then you can take the nuts off the last turn and then remove the tires.
A lot of guys don't like the Dayton type wheels, because of the re-tightening procedure to make them run straight. I actually prefer them to a budd, or even pilot wheels. If i'm on the side of the road with just a ratchet and breaker bar, I can have a set of Dayton's off with 5 lugs. A budd wheel, if you need the inside one (its always the inside one with my luck), you have to take 10 nuts, then one wheel off, then do 10 more for the inner stud/nuts. And one of them always doesn't come loose like it should. And the Daytons are actually stronger in my opinion, you're carrying the weight from the large center spoke, rather than the vertical steel or aluminum rim width.