GrayJay

I have had no trouble with the bolt-on hangars rotating from braking. So long as it is set-up with good verticle alignment and the through-bolt is tight, there is not really much sideways torque on the hangar arm when the brakes are applied.

For my steel CX fork, I decided to fabricate and add a somewhat more permanant integral hangar to the fork, definitly zero chance it will ever rotate;