脚车的类型。。。

mixie

The Folding Bike Bag by Bergmonch is a combination of a backpack and downhill bicycle. It sounds rather heavy at 9.5kg, but boasts a folding mechanism that keeps it small and handy as you tote it on your back. It takes only two minutes to open it and convert it to a bike. Instead of just walking down hill the Bergmonch makes your descent descent into a thrilling experience even on rough trails.
http://www.woohome.com/mobility/bergmonchs-folding-bike-bag