LTS ~t.ly/LTS 

What is the Lightest Foldable Bike ?

The single-speed Hummingbird was the original Hummingbird Folding Bike and is the lightest folding bike available in the world. The single gear hub has a smooth, light design, with gearing being carefully balanced to assure effortless riding. It weighs in at a mere 15 pounds (6.9 kgs). 

external :

look at the top 10 lightest folding bikes 

cycletraveloverload.com/lightest-folding-bikes-in-the-world/ 

The world’s lightest folding bike, weighing 6.9 kg / 15.21 lbs –

 the Single-Speed Bike from Hummingbird. 

This bike is a true testament to the fact that sometimes, simple is better.