Originally Posted by
Duragrouch
That member's post to ask how to swap calipers was due to terrible performance of the mechanical calipers and pulled one apart and posted photos, and the problems were obvious, a simple mechanism with no seals against contamination, plus piston only extends on one side. IIRC, that member was in an area with almost no rain, but a whole LOT of sand, as far as the eye can see, contamination issues even riding purely on paved road.
I remember the post with poor quality dahon caliper (housing casting full of flashes and the poorly machined ball bearing locations). Hence, my suggestion to OP to fit some spyre if 100€ cost is acceptable to him. The spyres are reliable and have descent braking power. They are the "go to" for unsupported remote applications and do work well in CX racing