How long before those disk calipers start appearing on some very light MTBs?
Maximum tyre size is 28c, so probably not at all otherwise we’d be running road callipers anyway.
the rim caliper adjuster probably works something similar to the old hope c2 master cylinder.
I was pondering that, with no feasible way for significant ammounts of heat to get into the fluid (the pads would surely melt first) they could make them a closed system and shed the weight of a master cylinder and adjust for pad wear manualy (no big deal on a road bike).
But you’d need an open system for the disk brake to funciton (no adjuster visible in those pics?), which implies they’ve built a resevoir into the levers and the adjuster on the calliper is simply moving the whole cylinder in/out to adjust lever pull/clearence more like the system on the top end elixir levers.