My best guess..

Looking at the photos, you can see that there is only the width of a pad on the near side of the caliper, and extended travel on the 'pot' side of the caliper. They look like they are radial mounted, which is wierd, but they must be floating.

At a guess, they work by effectively pulling the far side pad onto one side of the disc, whilst the near side is directly applied to the disc.

I can only presume that this is to improve unsprung weight????

JJ