Treks Ride+ series of ebikes claims (on the video) 15-45km (9-27 miles). But it actually gets at least 30 miles for me - but I pedal a lot and use the regenerative braking. I think I can get a max of around 40 miles, but when I did a 43 mile trip (the Five Boro Bike Tour in NYC) I didn't start using the power until mile 27 so you can go a lot further. The bike is really pretty light for an ebike, and uses a 6.4AH battery. Yes, only 6.4. Their motor appears to be very efficient.