Originally Posted by 350htrr

Would you believe there are people who poo poo the idea of re-gen on bicycles as a waste of effort... Not me, I have the BionX system and it's well worth it as I live in a hilly area so there is/can be huge gains available as long as you do it and do it conscientiously. I have tested my set up and have managed up to a 28% re-gen capacity, tho I must say that is a max average and you would actually NEED to pedal down most hills to keep up your speed if you have it on the max re-gen setting. My real average is probably 15% and most people who don't live in a hilly area would be lucky to get 5%. IMO

I could even use it as an exerciser and increase my pedaling effort for normal riding, but that is not what most people would buy it for.