Bungie
FrostBack #2 - IBA # 44620
I ran Dynabeads in the front and the back (car tire) for my big trip last Sept. A little vibey first thing in the morning on highway for a few miles, then smooth as glass. I won't be using them again though, I'd rather use weights and be able to use Ride-On in the tires. Same thing, smooth as glass but with some puncture protection.