Rohloff makes an OEM disk brake model, and a retrofit disk hub. I got the OEM since I built the frame and used thier dropouts which are two part and adjustable. They also have a winter oil and an all season oil. This will be my first winter commute with the rohloff. I did have my derailleur freeze last winter, and it would not shift until I knocked the ice off.
The rohloff's have a issue controlling torque and the soultion on the retrofit none disk is a bar that transfers the torque to the chain stay. The disk brake retrofit model uses a "speedbone" that attaches to the disc brake tab and is much nicer to look at.
The oem droputs eliminate all thos problems.
I would stongly suggest that if interested that you read the manuals that are on thier web site. Rohloff's that is.
I have not been riding the hub that long, just finished the bike in late June. But I will say this so far I love it.