I&#x27;m not saying that&#x27;s what he did, but they have very clever (and expensive!) electromagnetic wheel motors that can provide ~50W of power for extended periods that likely wouldn&#x27;t impact the pedals.<p><a href="http:&#x2F;&#x2F;cyclingtips.com&#x2F;2016&#x2F;02&#x2F;electromagnetic-wheel-motors-possible-in-theory-but-unlikely-in-practice&#x2F;" rel="nofollow">http:&#x2F;&#x2F;cyclingtips.com&#x2F;2016&#x2F;02&#x2F;electromagnetic-wheel-motors-...</a>