The world’s lightest folding bicycle that it weighs only 6 kg has been built by a talented engineer Derek Cranage has built his own frame from aircraft spec aluminium, carbon fiber and titanium. Every single item in the bike’s construction is bespoke and trimmed to the last fraction of a gram. The creation of Derek Cranage incorporates a frame that was designed and built entirely from scratch, with the whole bike folding down into a package measuring 590 x 600…