Originally Posted by
CliffordK
Uhhh

That means all my 11s SR parts are now obsolete.
But, I suppose on the bright side, we'll be seeing a lot more 11s stuff popping up on E-Bay shortly. I'd still like to try some of the new Campy 11s Hydraulic, but the prices have been daunting. Maybe now.
Shimano has had 9T on their 9s for a while. Some people have run it with 10s... and I have made a 9T, 11s
It shouldn't be hard to make 9T, 12s, once the donor cassettes are available

You can't fit a 9t on a normal freehhub, so it would necessitate a swap such as to a xd that sram uses