Catch-a-Ride stations are littered all over Pandora. Near enough for the stranded Vault Hunter to catch a needed ride, or maybe some extra firepower.
Original Game content contains two versions of the runner. One with a machine gun turret, the other with a rocket launcher turret.
The recent DLC "The Secret Armory of General Knoxxx" include a newer faster version of the runner, along with two new vehicles. The monster is a rugged SUV type vehicle that sits two with a turret that shoots a three shot spread of homing missiles. The Lancer is the new four person vehicle that comes equipped with a mine seat, blast seat, gun turret seat, and of course the driver seat.