Installed new rear Hankooks the other day. It only took 1/2 oz of weight on the right rear. The left side didn't need any weights. They may be heavy but the 135's must but be pretty well made to balance that well. Hankook must do a pretty good job on constructing the V12's also. My last set had none on the left rear and a couple of ounces of weight on the left. Wheels are in the same positions as before.....curbed one on the right side.