I recently purchased a new set of tires for my 2007 Frontier. Capitol Precision Trac are the make. Before I replaced the worn tires my truck never shook and was always smooth no matter the speed. Now even after having the tires balanced upon installation and a 4 wheel alignment my truck shakes at speeds over 60 MPH. I took it back to the place that put on my tires and had them recheck the balance of the tires and they said that they were good. I had BF Goodrich A/T on prior to these. What could still be causing this issue? Or is it the brand of tire I chose? Any help would be greatly appreciated.