30/03/2021 · During 2020, between COVID lockdowns, employees of Sling Aircraft rode the 35km Sling Trail in Johannesburg South 157 times. A circular route, starting at the Sling factory, the trail incorporates 10 km of tar road and 25 km of dirt, split into several sections which include fast gravel, single track, loose rock and stone, mud, sand and downhill.