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So with dual action you'd have to undo the bolt tighten the cable redo the bolt. Whereas dual action would require me to also adjust the non-actuated pad with the bolt on the side? I've only briefly used mechanical disk brakes but never got on with them, this might be what I've been doing wrong.
Tijmen-
No, with single action you adjust the fixed pad and move the caliper. With dual action you adjust both pads. You should avoid using the cable adjuster due to the change as the arm moves of the ratio between cable pull and pad movement.
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Both would require you to adjust the non actuated side, I.E. The brakes above and BB5 AND 7 AND the actuated side, 5 by pulling the cable, 7 via the red outer knob.
Which means that even though Sypres are dual actuated and even IF you set it dead center you would then adjust both sides the same to get the same dead center bite.
Emyr
coventry_eagle
You always have to adjust for pad wear with a mechanical brake regardless of whether the second side moves or not. If you only use the cable adjuster, you end up with a really dead-feeling brake.