The Stovebolt Site Forums The Parking Lot Big Bolts air disc brakes, input wanted

We had a bus (Trailways style) stop in front of our store with a wheel locked up. It had disc brakes. I crawled under the bus with a hammer and tapped around on the caliper and the wheel freed up.

It had just snowed so I didn't spend a lot of time looking at the brakes, but they looked like the Haldex ones in the link(s) above. My first impression that these were just like the old wedge brakes, which were junk compared to the s-cam style.