What size tire is it? Were you able to break the beads and now trying to remove the tire from the rim?
I don't have a CC but I've been around the tire industry for awhile, and it should be a single piece wheel. Not sure about the shaft weld, but you may want to change the tire out and leave the wheel attached while doing the change out. If you're having trouble breaking the bead, Northern Tool has a bead breaker, the Little Buddy or something that I like for working on ATV and mower tires. The other thing you'll need is an air tank for getting the new tire beads to seat and take air.