I have a Karate Monkey set up with BB7s front and rear. Absolutely love the bike and brakes, btw.

Disc brakes and track ends are not a perfect marriage. However the mounting holes are oblong so all you have to do is loosen the mounting bolts and slide the caliper up to get the wheel out. I was worried that the whole set-up would be knackered when I removed/replaced the rear wheel, but so far it has not been a problem. Every time I get the wheel in and crank down on the brake mounting bolts, it has all come together and not required adjustment. Seems to work right, but I would rather not have to loosen the brake to remove the wheel.

jim