I just want to add constant power to my bike. I have a 27 mile commute. I could do it on a daily basis, but then actually working for the rest of the day and driving back is a whole nother question. What can I do to just add constant power, while I pedal, I don't wanna be limited to 20 mph. I'd like to think that I can make this commute close to 30 mph with constant peddling. Oh yeah I want to do this to a light road bike. I don't need to be a speed demon, but I know I can peddle at 20 mph without a motor assist. What are the best options for what I am looking for. If I need to provide more info let me know.