Videos of people going downhill on race courses made with all sorts of devices to overcome sheer drops (boards etc.) in shantytowns on very steep hillsides have circulated for years, but these guys do it on the streets.
As is mostly the case with things like this, it involves some innovative bike design ...
If hippy were ever to look for a new cycling discipline, he'd beat all comers, obviously. No need for any bike modifications.
https://www.theguardian.com/cities/2019/oct/02/we-live-for-gravity-biking-deadly-sport-is-way-of-life-in-medellin
Videos of people going downhill on race courses made with all sorts of devices to overcome sheer drops (boards etc.) in shantytowns on very steep hillsides have circulated for years, but these guys do it on the streets.
As is mostly the case with things like this, it involves some innovative bike design ...
If hippy were ever to look for a new cycling discipline, he'd beat all comers, obviously. No need for any bike modifications.