Bionic legs can be installed on a colonist to replace a missing or damaged leg, including the foot. It has 125% efficiency, increasing a colonist's move speed by 12.5% for each one installed.
It can be bought from traders or crafted with 15 and 4.
As with all bionics, it will give a mood buff to anyone with the Transhumanist trait and a heavy penalty to anyone with the Body purist trait.
In Beta 19 it received a nerf to efficiency but is now craftable.