A Grav-Train, leaving the platform

Grav-Trains (short for gravity trains) were large, hovering freight trains which flew through the city of Metropolis on planet Kerwan. They often carried luggage and crates and were commonly used by Gadgetron Corporation.

Ratchet used a Grav-Train in Ratchet & Clank to catch an Infobot. In Ratchet & Clank: Up Your Arsenal, Ratchet fought Giant Klunk on two Grav-Trains.