I have a bike that came originally with roller brakes. I would like to remove the roller brakes and install rim brakes instead.
For the rear wheel (this question is only about the rear wheel) there is what, to my inexperienced eye, look like mounting points for rim brakes. The problem, however, is that they are almost at the same height as the rim, only about 1 cm above of it. I haven't found a brake that would fit this geometry, and I'm not even sure how such a brake would work (it would be a kind of U-brake but the pads would travel a long way upwards for a short movement inwards).
Is there a brake that would fit here? And if not, are these mounting points actually not intended for brakes? Maybe just for holding cables?
A caliper brake is not an option, as there's no mounting point for it.