Steamhammer (RID)

The name or term "Steamhammer" refers to more than one character or idea. For a list of other meanings, see Steamhammer (disambiguation).

Steamhammer is a Decepticon from the 2001 Robots in Disguise continuity family.

You can't see me!

_{This character has no official visual representation in any Transformers product or media... yet, at least.}

Steamhammer is part of the villainous Dominus Trannis. Reformatted from Rapid Run, he is the team's muscle.

Fiction

In Viron 704.31 Epsilon, Steamhammer was created when Megazarak used the Robo-Smasher to implant shell programs into the members of Team Bullet Train. Together with Loco and Astrotrain, he formed Dominus Trannis. The personality component used to make him was quite old, and as a result Steamhammer was a crotchety old train. He remembered fragments of his eight million years as a Predacon but not his original identity. Ask Vector Prime, 2015/07/30

An abandoned OTFCC 2004-exclusive redeco of 2001 Robots in Disguise Rail Racer would have been named "Dominus Trannis". "Steamhammer" was suggested by Graham Weaver as one of the component's names^[1] while "Astrotrain" was decided for another component, and "Loco" was considered for the third. Steamhammer went on to inspire names for later official toy releases.
Presumably, Steamhammer transforms into a 700 Series Shinkansen as Rapid Run does.