RE: Remove old tires from rims
you don't want to just balance the rim/tires, make sure you mount the tire to the rim first. I don't know if you were planning on balancing just the rim or just the tires, balance them together as a set. I'm only saying this because you asked "Now how do I balance the tires.", which lead me to believe you wanted to balance them separately....(which I guess might work.....? but would be harder overall I think?)