JoO wrote: ↑Tue Aug 27, 2019 5:52 amInteresting read/listen
https://cyclingtips.com/2017/06/cycling ... ss-matter/
Heine's analogies, as usual, are a little flawed here. His trampoline analogy for example. The reason why the trampoline feels so much more efficient is because the wavelength between jumps increases. You're doing the same work per jump, but you're jumping less often, of course it feels easier. I think most of us agree any power loss is from hysteresis and it's so small it doesn't really matter if you're just reading results from a hub PM and a spider PM.
Biomechanics on the other hand, really hard to qualify. For example I prefer oval rings. It doesn't increase my maximum power, but it results in more comfort in my pedaling dynamics...probably from reduced micro-accelerations. Oval rings would seem to counter Jan's intuition since it makes the "pushback" harder during the peak power phase. Turns out people prefer different things.