Balancing Tires

[zjwrekkr]

So my dad had a vibration on his truck. Balanced tires same problem. Bought new tires same problem. Had them rebalance after a couple thousand, same problem. Had the driveshaft balanced, same. Had the tires road force balanced, same. Had all the brakes calipers rotors removed and checked axle alignment, same problem. Finally the dealer called HQ. They said to balance the tires by putting the wheel weights down the centerline of the rim, not on inside/outside. Had this done and it solved the problem. Any you guys experience this? Any thoughts how this would resolve the issue? My only thought would be that it some how changed the harmonic frequency.....