tiagra 4503 front mech problems

jameses
jameses Posts: 653
edited February 2012 in Workshop
I've just fitted a new front mech (tiagra 4503 triple), but am having some problems. I have managed to get it to the point where I can select all three rings, but the chain rubs on the outermost edge when in the highest gear; every other normal use gear seems fine (small ring and smallest couple of rear sprockets also rub, but wouldn't use that combination in normal riding).
Sounds like a job for the limit screw, except the damn thing doesn't move the mech one mm! :( Anyone know how to get around this? I've tried putting a bit more tension into the cable, but this stops me from reaching the lowest ring.

james

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