Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
raedārĭus (rēdārĭus), i, adj. [raeda], of or belonging to a four-wheeled carriage: mulae, Varr. R. R. 3, 17, 7.
Hence, subst.: raedārĭus, i, m.
rēdārĭus, v. raedarius.