im running 37inch coopers and had them spin balanced when they were installed and never had balancing issues. after my last trip to rausch creek i broke a bunch of my valve stems. when i went to pep poys to get new valve stems(they has to pull the tpms sensors) i asked them to balance them too. well they said there were to big of a tire to balance, which is weird cause they were the ones who mounted and balanced them originally...anyway i picked up some dynabeads, they came in 5 10oz packets, had them installed yesterday and wow! going 80 is as smooth as possible. just wanted to post this incase anyone else wondered if they work

 

Wonder how these work with super swampers? And how much are the beads? I didn't know that the company is right here in Rochester NY!

 

Go to there website and it tells u what size bag to get depending on the size tire mine requested 10oz bags

 

I haven't felt that yet, maybe on a swamper or something hard to balance u may feel something like that...when my tires were unbalanced I only shook when going over 50mph

 

Wow. I just put in 10oz of offroad dynabeads, and the ride is finally very smooth. This produc works very well.