I did the conversion with an adapter with a surly new ultra hub for double 6 bolt interface.
Used the threaded side for the rear brake because it's more fo sho then real braking because it's zee law in Zjermany to have two independent brakes.
And yes, the threading goes the right way for the braking forces.
The rotor does go "out" quite a lot though, it was a bit tricky to get the brake aligned.
Ha, proper niche! I had actually searched for double disc hub knowing that it likely didn't exist - but funny to know it wasn't a totally unique line of enquiry.
I imagine I would end up with the surly hub, but figured it was worth looking around for as the hubs are £120!
This looks like a good candidate from tartybikes doesn't it?
The flanges are also quite in similar distance from the centre, and the freewheel instead of fixed thread should give you more room to align the adapter properly for the rear brake.
I did the conversion with an adapter with a surly new ultra hub for double 6 bolt interface.
Used the threaded side for the rear brake because it's more fo sho then real braking because it's zee law in Zjermany to have two independent brakes.
And yes, the threading goes the right way for the braking forces.
The rotor does go "out" quite a lot though, it was a bit tricky to get the brake aligned.