I've got a box of parts that minus a frame (which I want to be steel) = a new bike.
I have a Rohloff hub with a disk brake, so I am looking at frames that either have an eccentric bottom bracket (example Salsa's El Mariachi), sliding dropouts (ex On-One's 29er, which has been out of stock for months), or horizontal dropouts that will work with disks (ex the [Surley Pugsley]).
What else is out there? I know I'm missing god knows how many other frames, but I'm googled out.
Must be steel, not looking for custom made (ex IF, I don't want to wait two years for a frame), but an off the shelf SS frame.