I have tried this on my 35x12.50 MTR's and they did not work. I though that damn dash board was going to shake apart on the highway. Belle tire got it balanced right with weights. I tried it again on a smaller set of 31's and it was not right either. I had then rebalanced conventionally. I tried airsoft pellets then the stuff that Belle tire sells. It was not really noticeable till around 60mph.