Steam Bikes (蒸気バイク) are steam-powered motorcycles used by guild leaders and those rich enough to afford one in The World R:2. They offer a considerable boost in speed in both fields and Root Towns. However, Steam Bikes cannot be used in dungeons. Bikes have their own category in the Books of 1000.
Steam Bikes can be used to crash into monsters to deal damage, counting as a surprise attack when successful. They are also able to run over Lucky Animals and Chim Chims.
Steam Bikes can be customized with additional parts to enhance their abilities.
Steam Bikes are sometimes considered the R:2 equivalent to The World's Grunties, since Grunties still exist, but not in a rideable form.