Also rack-. north. dial. (See quots.)

1

1794.  Hutchinson, Hist. Cumbld., I. 460. [The] Brandling … is the Rackrider of the county of Durham, and the Samlet.

2

1825.  Brockett, N. C. Words, Wrack, or Wrackrider,… the same species of trout as the brandling.

3