The Rail Exceeder (レールエックシーダー Rēru Ekkushīdā) is Rail X's personal changer. Its name derives from the Exceed Railman Pass.
The Rail Exceeder was part of the Rail X Gear, which Emi developed initially as a countermeasure for the rest of Project Railman. Emi could use the Exceeder in both the real world and the simulation, using it to supossedly pose a threat to the Railmen, as well as to sabotage redacted-.