As long as it rides and drives good, I wouldn't have them balanced now. But I always balanced my steer and drives. I don't remember ever having a new tire on a truck that didn't need balancing. Never bought $1100 tires either, so maybe I have missed out all these years.
I've had mine do that in cold weather. The intake heater light has even cycled a couple of times in really cold weather. It does throw a yellow check engine light when it does this. I experienced no problems when engine was doing this.
There was a certain RPM that mine would cause things to vibrate. I always set mine at a speed that was smooth. It was somewhere around 1000 RPM. May have been under 1000 by a little.
Zipp Express in Gallatin is a straight up company. I ran almost 9 years for them and was happy. Any other questions, PM me. I retired last July, but go by office quite often.
What you experienced was a big ole helping of "Southern Hospitaility". We will treat you so many ways that you have to like one of them.
Seriously, it is "respect", which is taught to us from birth.
Doesn't matter what will happen when it goes. It will be "where you are" when it goes. Guarantee it won't be at a repair shop. And it will probably be when you are under a load and running a tight schedule. At least that is my luck. It is such a simple and inexpensive repair that putting it off...
It's pretty obvious that it happens quite frequently. I also read somewhere that the RR has a steel beam across the road in front of the bridge, so the bridge is not being hit. Trucks hit the beam and it saves the bridge.
http://www.wral.com/news/local/story/9810394/