This is my folding bike I use for commuting. Only 9.5KG which is perfect for my train commute in from Cheshunt in to London (I live about 2 miles from the station). I know I am biased, but I do think this little Urban Lite 1 16" folding bicycle is great and soooo light!

http://www.buybuybicycles.com/urbanL...ding_bike.html