Suppose I have a disk-compatible hub and frame, but want build a wheel based around a very specific touring rim, which is labelled as being for rim brakes.
My understanding is that you cannot attach a rim brake to a disk-compatible rim, since the sidewalls are not designed to withstand the stresses. However, it is not obvious to me whether there would be any problem attaching a disk brake to a wheel with a non-disk rim (assuming that it's been built around a disk-compatible hub, and is attached to a disk-compatible frame).
Is there some problem with this configuration? The obvious drawback would be carrying around the extra weight of a reinforced rim, but that doesn't seem to prevent the wheel from actually functioning.