I have read countless posts and threads about both. It seems that some have issues with BB's, some don't. Some have clumping with ceramic, some don't. I can't see how it would hurt the wheels. The BB's are pinned to the tire once it gets up to speed and then fall about a foot onto the wheels lightly when stopping. Can't see how it would ruin a wheel. But we will see once I do the deal. For the time I will have the tires on, it's not worth balancing them in a shop. I plan on having these on the Jeep for less than 2 months. Might drive 200 miles in that time so not worried about it.