I've always heard results are not-so-good in smaller car tires, the shorter radius means more speed is needed before a balance can be reached.
That said, I too had great results with it. Bought 34x10.50 Interco LTB's for my off road truck years ago. 2 shops in town wouldn't even try to balance them, both said that being so large (not that large now days) and being bias ply Swampers meant nothing could be done to help them. Truck was undrivable over 45, literally looked as though the dashboard would break, and felt like a wheel would be torn loose. I can't recall of I used 8 or 10 oz of BB per tire, but I also threw in about 1/2 cup of coolant to avoid the freezing/clumping issue (this was in the UP, and lots of year round wheeling and inflation/deflation, so I was bound to end up with some water or condensation in the tires eventually). I too was amazed at the results. Even at freeway speeds (which the truck could barely muster) it was as smooth as I'd ever expect gnarly mudders to be.
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