Trek 930 Rear brake setup
 

I just purchased a 1991 Trek 930 in a 16.5" frame. It has Dia-compe cantilever brakes, but on the rear I discovered I am missing a guide for the break. However, I can't see where the guide was attached. The brake bosses are there and the cable between the 2 sides of the brake exist. The cable runs from the cross-cable to a cable guide that is on the top tube just in front of the seat post. What I'm missing is something between the top tube guide and the brake. I can't figure out if there is a bridge that should go across and if so where. Does anyone have a Trek 930 around the 1991 vintage that can help me out.

I found what I needed. There is a rear brake cable hanger that attaches to the seat post binding bolt. This provides the cable housing stop that is needed for the cantilever brake. Whomever had the bike before me must have lost the braket when they took the seat post binding bolt out of the frame. Their cheap so I've got a couple on order (in case I lose one too) so hopefully this weekend I'll have stopping power on the rear brake.

I gave you a link to the one I used on my Trek 930. You're welcome.