Originally Posted by
Darth Lefty
Careful, new Tiagra 4700 has the new RD geometry of the road 11-speeds and takes different pull and this trick no longer works!
Old Tiagra 4600 would work fine.
Good point. The latest Tiagra (has both shift and brake cables running under the bar tape) is the only Shimano 10 speed road group that uses the new cable pull ratio. If it's 10 speed Tiagra with the shift cable coming out of the side of the shifter (externally), then it uses the old cable pull ratio.