Originally Posted by
bergerandfries
I've seen the headset cap/screw combos that allow the brake housing to pass through the fork on the way to the front brake (usually front disc).
What kind of bike have you seen that on with disc brakes? I've seen BMX freestyle bikes with it (combined with a cable detangler for the rear brake to allow barspins without fouling the cable), but it's always run to either a sidepull brake or a U-brake, as no BMXer would want a disc brake (they'd bend the rotor doing grinds)