One place where battery bikes will always outperform ICE machines is on high mountain passes. While petrol bikes struggle to run with reduced oxygen, the lithium-ion machines go even quicker thanks to thin air and cool temperatures. Electric dirtbike maker VARG took advantage of this at the end of last year, running a standard unmodified VARG EX to 6721m on the Ojos del Salado mountain in Chile. The achievement has earned the firm and Swiss rider Jiri Zak a Guinness World Record for the highest altitude ever achieved by a motorcycle.










