Does anybody know how to put a rear disk brake system on a Trek 6500 2001? The frame has two nuts already, but on the horizontal part. I think it needs a special part to fix the brake...
Since I'm a computer-illiterate dink that can't post a link (hey, that rhymed), go to ebay and punch in "Trek disc brake adapter". There is a seller with exactly what you need. I haven't used one of these, so can't attest to how well they work. Good luck.