@cbmojo The 750W geared Bafang hub motor on our Radrovers is only wound for up to 20 mph. That is why the power tapers off after 20 mph if you change the top speed on your LCD to 40 kph (24.85 mph). The bike will do it. It will just take a very long stretch of flat ground and no wind. Our motors are designed to have the maximum amount of torque from 1 rpm all the way until 20 mph. There isn't much you can do for top speed the way our bikes are set up. I would suggest building an ebike with a 1000W Bafang mid-drive motor. Most builds will do 30-40 mph depending on gearing setup.