I have seen these hovering just under the radar for a while, I have been interested to see what they can do as doing away with the piston and indeed sticky piston can only be a good thing. (You'll know what I mean if you've ever had to strip clean and replace a piston and seal on a disc brake.) This design in theory should eliminate that.
Are the any good though?
See here :http://www.bikerumor.com/2011/05/18/review-ashima-pcb-pistonless-hydraulic-disc-brakes/
