Been away from the forum for quite a while. Back with a question. A friend of mine has Ultegra 105 shifter and R.D. Up front an FSA 53-42-30, he wants to go to a 11-34 cassette. Obviously, he will need a new R.D. with long cage, I suggested a RD-M771 SGS. I know that he is off a little bit in the spec. dept., having a 53 large chainring. Is this setup doable ??
Chain length, will a 116 links long enough or does he need longer chain, frame is medium.