hi guys.

I've purchased a little bit old tri-bike frame a month ago.
there are attacted TRP brake set front and rear bb.
there is no problem with front brake.
But, the rear brake is really problem.
It is very hard to place an cable with no friction resistance.
and as a result, rear brake couldn't be return properly.
I've tried to find solution(including change brake, too) and alterations to rear brake for works properly. and then failed.
But, at last, I think the problem solved by adding spring.
I want to share this all peoples who suffering this problem.

You can understand what I did on brake, seeing photos.

I hope this post helps.

Thanks.