The abs ring dont need to spin,its spin with the brake disc.
you have to remove the old ring from your old disc,or buy a new one,you need to install on the new brake disc,and this little ring dont spin or you cant remove with hands.So i mean it needs to be tight.
I hope you understand sorry for my bad english
here is a picture of my rear brake disc(if the ring seems bigger you need to grab a little hammer or someting to make it smaller to tight fit on the discs)
Greetings from Hungary!