I am the owner of a Google Group. I am using the new interface. The group is a public group and is available at https://groups.google.com/forum/?fromgroups=&nomobile=true#!forum/sr-api.
I cannot find a way to subscribe to new posts using an RSS reader. I have done some googling and it seems that the new Google Groups does not support RSS feeds. Have anyone found a way to get an RSS feed from the new Google Groups?