I have a road bike with Mxus 19R 1000w nominal rear hub motor with a 52V battery. I followed ca guy on YT that continues to say that mid drives are much more effective at low speed because of the gearing range. My motor has a reduction gear with a ratio of 1:5.8 with a 28 inch wheel and peaks at 55 kmph top speed with a full battery. I use my bike for long flat trips on asphalt. What speed should I keep constant in order to travel as long as possible with one battery? Thanks in advance!