Originally Posted by
Jakedatc
I get the saggy cable under the top tube also so i think i might be in the same boat. I did go lube up the joints and dripped some lube into the housing and that has at least improved things so that the calipers will open up far enough to not rub so i'm ok with it for now. I would like to find bigger housing so that the sagging cable issue is solved also.
I'm not so sure that is the problem/solution, as I'm not sure what you mean by "saggy cable," so it's not clear it's the same problem. Again, the best way to diagnose is to isolate the components. If there are housing sections from the brake lever to the top tube and from top tube to the rear brake then checkk each section by loosening the cable and moving each section back and forth by hand. Too much friction can also be caused by the housing being either too short or too long. Should have a gentle curve, neither stretched nor looped out.