Is this the world's most extreme BMX?

When we were a lad, the most extreme BMX in the world was the crimson-spoked Raleigh Burner that fat Dave from up the road used to roll about on. Sadly it died in a tragic incident involving a steep downhill slope, a gammy brake cable, a small wall, a sudden stop and a 360-degree head-first flip.

That wouldn't have happened had Dave been riding an Athos - the world's most extreme BMX, probably. The innovative four-wheeled pushbike "marries the intense stability and handling characteristics of a quad with the flexibility of a bicycle," according to its maker, Contes Engineering.