I think that as you pedal you shift your weight, also wobble a bit, and any uneven road surfaces can be harvested theoretically by this. This doesn't create fr

I think that as you pedal you shift your weight, also wobble a bit, and any uneven road surfaces can be harvested theoretically by this. This doesn't create free energy it just captures inefficiencies created by transfer of energy from your muscles to the wheel. But there is no free cake. This can't work by just sitting still at it :) Also 30% improvement sounds like a outright lie or marketing PR talk. Anyhow even if real i dont care about +300$ wheels.