Cross posted with the Classic and vintage forum
Ever since I finished my Mercian I have had one nagging problem... spongey brakes. I mean really spongey... like coaster brake spongey. I ride in the rain and had to drag my feet on the ground going down hill towards an intersection.
Here is why this seems so wrong. I have modern Dual pivot calibers, aluminum rims, modern aero brake levers AND really fancy kool stop cartridge pads. I have cleaned the rims and pads with alcohol on more than a few occasions.
The only thing I can guess is that the no name old brake cable housing is to blame... the inner wires are stainless steel.
I recently installed these new calipers with no positive effect:
Here you can see the kool stop pads: