Comet Ive ran bb's in every tire Ive mounted from 33" radial at's to 39.5 tsl's.. it just makes all tires balance nicely.. far better than a static balance ever could.
Kelly I use a shot glass to measure the amount... here is a old quote froom my on PBB a couple years ago on bb balancing:
Damn sometimes people just over think these things...
For 33's one full shot glass of bb's will do ya. For 33-36's a shot and a half, over 38 at least 2 full shots.
I have yet to have an issue with tire damage from running bb's for balance. Remember they are round and they dont break so there are no sharp edges to hurt the tire. Been running them in everything I own for the last 4 years.
Dont buy copperhead bb's, they are copper coated and the coating will flake off and clog the valvecore next time you air down. Thats pure experience talking there. I use quicksilver bb's, they are about $6 and I can do 2 sets of tires with the one big box with enough left over for???