I really do not have a particular speed. For the most part, my speed depends on the road condition, weather and/or traffic. With side windsor rainy weather, usually 50 to 55 MPH. No winds and clear weather 65 to 70 MPH. There are times (not often) I just fee like poking along at 55 MPH. I have different comfort levels and stay within those. I might add, my speeds do not change much with just the TC or towing my Samurai. When towing I usually have to make a conscious effort to drive at 55, which is the speed limit in Calif when towing..
Wayne