Denny, the XZA3 tires we have mounted have been so close to in balance that we figured nothing was required. We had been running a lot of Bridgestones and Firestones for the past 6 or 8 years. I haven't bought anything but a Michelin in the past 2 years. Same goes for the singles. They were as close to perfect as tires I have seen in the 51 years I have been running trucks.
