Ring species are simply different breeds of the same species that no longer mate - like Chihuahua would be a ring breed to the wolf. You know it is of the same species - descended from the wolf, so just because they no longer mate means little, since you are quite aware of it's lineage. You may if you wish classify it as a subspecies of the wolf.
https://en.wikipedia.org/wiki/Species
"Presence of specific locally adapted traits may further subdivide species into "infraspecific taxa" such as subspecies (and in botany other taxa are used, such as varieties, subvarieties, and formae)."
Just as you may if you choose classify those ring species as subspecies, breeds, varieties, subvarieties or formae, but not species. They are infraspecific taxa brought about by local conditions. Again, it is simply your incorrect classifications due to incorrect pre-concieved ideas that leads you to this incorrect thought process. A thought process where you ignore your own definition of infraspecific taxa - which is what we are discussing when we discuss those so-called ring species.
http://iczn.org/nontaxonomy/term/471
Show me a single ring species that they do not believe came about due to local conditions? Then you should know they are infraspecific taxa - and not seperate species, shouldn't you, regardless of what they attempt to tell you so they can claim speciation.
EDIT:
I am asking nothing of you but that you go by scientific standards of classification as defined - and not willy-nilly however it suits you at the moment.
"Presence of specific locally adapted traits may further subdivide species into "infraspecific taxa" such as subspecies (and in botany other taxa are used, such as varieties, subvarieties, and formae)."
So what infraspecific taxa would you like to consider those "ring species" to be? Because by scientific standards that is exactly what they are.