We have been using glass beads at work in our 11R22.5 school bus tires. Our rear engine, 84 passenger buses are very touchy about front tire balance, we have a balancer that works, but the beads are working much better. Just toss in a 16 ounce bag and go. We have been fighting this for 6 years, the beads are the only thing that as worked 100% of the time. I believe you can shoot them in through the valve core if running tubes, you would need a injector tool.
www.counteractbalancing.com
