Does the bike currently use a caliper brake in the rear, or does it have canti/v brake mounts? What material is the frame? I wouldn’t trust any of the “bolt-on” disc brake adapters personally. I’d look into having a proper brake mount welded to the frame by a competent frame builder, which would be $$$ but the safe way to go about adding a disc brake.
As a shop mechanic, recumbent tandems inspire no fear, but I won’t help install sketchy brake setups.
Last edited by bboy314; 01-08-24 at 12:42 PM.