I have 22.5" on my truck and tried to use just weights to balance them and I hated my ride. It was almost unsafe to drive at highway speeds. So I got centramatics wheel balancers (I think they're called) You can buy them for anything but truckers use them a lot. They are a ring that mounts behind tire and continually balances your tire and anything rotating attached to it. So on a rear end it is balancing even the axles. but they work great and it's a one time investment. You can buy the beads that go into the tires and they work good to but usually you replace them after a tire change. I also have been told they stick to the rubber in the tires sometimes now because of condensation or other reasons, and no green slim or fix a flat with these.