so how many bb's do you put in? how do you put them in? I've never tried this bb's idea. Any bb's will work? or do they have to be special bb's? Let's face it, bb's are cheaper than centramatics. but how do you get them out if you ever want to? vacuum cleaner on the valve stem?
I don't recommend BB's due to A) they are made of coated lead shot; lead dust is bad stuff for tire installers (people who may work on your tires years from now) and B) it requires you to disbead the tire, big PIA; same with removing them.
I use antifreeze, far easier to install, no environmental mess (4-6 oz max) and won't hurt anyone if disposed of properly and won't freeze. To install, deflate the tire by taking out the stem valve (Schrader valve), attaching a 1/4" hose to it, put the other end into a container with your proper amount of antifreeze, then lift the vehicle, causing the tire to suck in the antifreeze. Put the stem valve back in and reinflate the tires. Done.
To remove the antirfreeze without dismounting the tire would require a tube smaller than the tire stem ID plus a vacuum - not impossible and easier than having to dismount the tire.
An alternative to antifreeze is small steel or stainless steel ball bearings. These are available from McMaster for about 400 for $10 or 50 SS for $8 or so (see page 1124 at mcmaster.com). The 1/16" or 1/8" size should fit inside the stem ID, but you would have to dismount the tire to remove them.
For the correct amount of dynamic balancer, see my or Bushpilot's post with the Counteract site listed above, click on the "tire size" link above left and you'll see it. Pick your size tire and go to town. Make sure to report here your results.
Keep in mind that it's easier to add more than to take away if you add too much - a little goes a long way due to the leverage - so don't add more than necessary
As far as wearing out the inside of the tire with these things, Google "rock tumbler". These things are designed to have an abrasive substance polishing or abrading hard objects like
rocks, operating for
days on end, rotating at a speed certain to not cause centrifugal force to hold it against the side (hence causing the media and targets to "tumble"), the inside liner is made of rubber and, usually, has a 5 year warranty (does anyone have tires that last 5 years anymore?). I have a pair of rock tumblers that I've had for +20 years and they were at least 10 years old when I got them - the rubber liners are perfect. The rubber certainly isn't rated or certified by the DOT in case of blowout at +70 mph. Just sayin'.
Good luck.
Al