My 33x13.5 ballanced out fine with good old lead. if there isn't enough
space on the rim for weight, have them stick on lead to the inside flat
part to get them balanced.

Wild

i read a articale about some internal balencing stuff in pettersons, they liked it, i know i end up loosing those tap on lead clamps the first few trails runs, all bias plys flat spot, its ok with me for the better price and better sidewalls, my cousins a trucker and they get there tire" shaved" on the rig they bassiccly shave the high spots as they rotate, youde think this takes off valuable tread, wich it does, but i hear it more than makes up for it if done right with even no scrub wear, i havent done it becouse i dont drive mine on pavement much , but its a thought, those airsfts are pretty light, i think youde need a crapload to help, but hey good luck! let us know how things work out

I use the ceramic balance beads in my 32x11.50's and it works great. No external weights at all. Kinda pricy, but worth it. I even bashed in a rim my last trip down to TN, and they compensated for it with no diserable difference, meaning smooth at 70mph.