The designer Arndt Menke thinks we were too hasty in giving up on one of the strongest, resilient, and lightweight natural materials. There are over 60,000 woody plants worldwide but we use less than 300 of them in a terribly unsustainable way. The Holzweg bike’s frame is totally made of wood and weighs a scant 2.3kg. The end result is an incredibly light weight bike, strong and pretty darn good looking too.