Get the disc brake version with the external shift box. If you can get the threaded axle version. I find that bolt on IGHs work best with Surly horizontal dropouts. You can make the QR Rohloff work though.
I would use a Monkey Bone torque control adapter and an OEM2 axle plate to stop the IGH from spinning.
The photos are a Surly 1x1 with Rohloff and Monkey bone. It's a QR version, but I used a bolt on axle to hold it as securely as possible. Surly Tugnut on the right to avoid hub sliding when I am cranking.
Vikb, would Surly's newer dropouts work any differently with a Rohloff? They updated their dropouts a couple years ago and I noticed you have an older 1x1. I know the update made rear wheel removal easier, but having no experience with these hubs, will it change the installation process at all.
No matter how slow you ride, you're faster than anyone sitting online whining about slow riders.
Vikb, would Surly's newer dropouts work any differently with a Rohloff? They updated their dropouts a couple years ago and I noticed you have an older 1x1. I know the update made rear wheel removal easier, but having no experience with these hubs, will it change the installation process at all.
I can't see how it would affect anything significant related to a Rohloff install. They look pretty similar to the 1x1 dropouts above.
BTW - Cass over at the While Out Riding Blog is planning a Rohloff'd Krampus. You can check in with him once he gets it done to see how it worked.