I'm not sure if this proves anything but when I built this wheel http://www.flickr.com/photos/63373992@N07/7122608451/ I sanded off the black coating on the outside of the rim this was very difficult sandpaper was not hard enough I had to use silicon carbide paper. My reasoning was the outside of the rim is in tension around the spoke holes caused by the pull of the spokes where the inside of the rim is in compression. Ceramics are strong in compression and weak in tension. The wheel was wrecked when I broke a chain climbing a 12 percent grade outside of Toombstone this forced the derailer into the spokes pulling a 1mm flat spot on the rim. The spoke hole did not bulge I had to grind 1mm off a spoke a DT alpine III to make it work. Also the spoke did not break but I had to cut it off. Since then I have put 2500 touring miles on the wheel riding to Bismarck ND. And yes the wheel is dishless and 135mm.