Originally Posted by
phogi
Is it possible to retrofit disc brakes to an old bike? I know this can be done on the front by replacing the fork, but not familiar if this can be done in the rear.
The nice thing of steel is its workability; its possible to on weld/braze ISO tabs and a brace. Many
have done it on vintage MTBs; if you really like the frame, its worth a shot. Ask your Local Frame Builder (LFB). For the fork, you're better off with a new fork as disk brakes add more stress in different areas.
So: weld and paint, new wheels, new fork. And you'll still have the bosses sticking out unless you remove those. IMO not worth it on a Multitrack, V's are fine and modern steel bikes with disk brakes are available.