The transforming 'dicycle'

Just like a Transformer, the Uno III Streetbike - or U3 - can convert itself with the push of a button from a conventional motorbike to unicycle-style machine. 

The electric-powered machine balances on two parallel rear wheels, the front retracting between them to allow it to manoeuvre through spaces so tight it can be driven into a building - and even fit in the lift.

Then, when it's time to zoom off into the sunset, the front wheel slides forward as the rear pair move back, giving the vehicle the stability to pick up speeds of up to 30mph.

It can travel between 30 to 35 miles on a single three to four hour charge.  The new vehicle was developed from an initial idea by Benjamin Gulak, a young American inventor.[lihat video]