128 kph would be my top comfort zone. Unfortunately, the police would not agree with me.Gregory the Relive video is GPS speed so it was up there. I find the beast is very stable at these speeds even though our roads are not good. I will find the point on the video where I was doing this and note that I had both panniers full and a large bike bag sitting behind me for my 5 day ride. I do enjoy riding the beast hard and she loves it. Other bike riders are impressed by how well she keeps up with them.