FROM UNishark:
Is that a mountainuni rig?
See thread: Mountainuni Disc Brakes Have Arrived!
Not a Mountainuni Rig but the concept is similar. Our Rotor attaches to the crank, and UDC Proto is using their dev hub which rotor attaches to. If you’re building a new wheel with hub, Can’t go wrong with the UDC system. It uses a lower bearing cap holder for the caliper.