So, Im curious - are eBike manufacturers just making up the whole different assist levels thing, or is there actually some science behind it? Like, does the motor really put out significantly more power in Turbo mode versus Eco mode, or is it just a marketing gimmick to make us feel like were getting more bang for our buck? And whats the deal with the weirdly-named assist levels - Trail, Sport, Comfort... are these just arbitrary labels or is there some actual research behind them? Can anyone shed some light on whats really going on under the hood (or rather, in the motor) when we switch between assist levels?