Video footage of a Russian man riding what appears to be the world's smallest fully functioning bike has gone viral.

The 20-second clip, first posted on YouTube, shows the man taking the miniature bike out of his bag before setting off on his journey. The bike is smaller than his foot.

Dressed in shorts and a T-shirt, the cyclist does not forget the safety rules and wears a helmet for his trip.

Despite his feet being five times bigger than the pedals, he manages to balance and manoeuvre the bike, which is known as the Minivelo.

Viewers have flocked online to share their views on the clip, which resembles a classic circus act.

One commentator said: "I would love to see a 600lb man ride that bike"

Another wrote: "Move aside Lance Armstrong..."