Rebuilding/upgrading a Centurion, no snide remarks I have already been trashed on Road Bikes, & having problem converting the Suntour downtube 12 speed shifter to a more modern 24 speed setup. The frame boss is on the top for the Suntour. LBS did not have a solution short of making a part to accept the new shifters. I do not want to drill the frame! Any ideas will be appreciated.
Also, can you convert a 1" threaded fork setup to a threadless fork. If so how do you go about it?