TrevA wrote:I've got a full Tiagra 10 speed groupset and can't get the STIs to index properly. I can get it to work fine one way (coming down the cassette), but then it doesn't work the other way (going up the cassette). I have to shift 2 up and one down to get it to change. It can't be a mismatch because it's all Tiagra......
Sounds similar (though not quite so bad) as the issues I had (mine was 10 speed). I'd pretty well exhausted everything (i.e. everything else had been swapped and re-setup by highly regarded LBSs) until I swapped the STIs for 105s.
Ian