Mounted up some new Iroks this week. Went with the bias ply, 36 1350 16's (measure almost 37). When I mounted them up on the wheels I did not balance them. After driving and hitting a couple of rolling bumps around 25 mph, I get the beginnings of death wobble. I have a couple of fender washers ready to go in, so the question is, should I balance the tires? BTW, they feel pretty good at 45 mph...a little noisier than MTs, but no noticeable balance issues.