"that depends on the dialect... in my dialect it would be [r\iNg_}] and
[r\iNk] ... from my experience, /N/ is usually [N] or [Ng_}] and /Nk/ is
usually [Nk] or [Nk_}], with [N] and [Nk] being most common." Robert B.
If you do not recall where you hail from, it is difficult for your reader to
see what your dialect is. :-)
To me [N] is not a phoneme in English, but a phone that is the realisation
of the phoneme /n/ before a velar stop. When /g/ is dropped, the realisation
is [n], e.g. shipping > shippin'.