A British inventor who specialises in self-balancing machines has built a bike that uses balls instead of wheels ...

Being uncommon also means they’re rather expensive if you wanted to buy a new one. Like any ... rider and the front wheel) or those with rear racks. Mike’s bike is the latter.

Bicycles need at least two wheels to be rideable, but [The Q] realized you don’t necessarily need the wheels to be in one piece ... the rear wheel of his bike first in half and then thirds ...