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So i cant get the middle ring to index at all..how do i sort it? The inner and outer rings shift fine, but shifting both up and down the chainset, the shifter seems to ignore the middle ring completely... ive tried adjusting the cable and the barrel adjuster but no luck as yet. Any ideas?
the shifter determines how much cable pull between gears which determines how far the mech swings.
is your shifter knackered?
or do you have a shifter with incompatible cable pull for your mech?
You really need to give far more info to find your answer.
Cheers GW..its an LX Shifter (M580), SLX front mech (M660-10) and LX Chainset (M580). It seems as though the shift doesnt want to stop at the middle ring, as though there is too much leverage being applied in the shifts. The routing is correct - top route, the bike is an OnOne 456. Any ideas?
does your shifter have 3 distinct clicks? (well.. 2 going each way)?
Start at the beginning
Set the mech straight and true
Set yout h & l limiters
If its and old cable/outers then change them
Make sure on the granny ring you are in te lowest on the shifter
Tension the cable correctly and away you go
Had mine in bits today
It's easy
It does sound like a double front mech changing on a triple.
Disconnect the cable from the mech and hold the tension with your finger, shift and detect three points of movement
Ok folks, the front mech is definitely for a triple chainset, and yes, under tension, there are 2 distinct clicks from the mech when shifting up and down, the stops are setup correctly, new cables.....and still no luck. Ive set loads of these in the past, never had an issue, but this one is driving me nuts..any more ideas?
One other thought..the mech is a 10 speed, but the setup is 9 speed. Would that matter? I was advised by On One (i bought the mech from them at the same time as the frame) that they were fully compatible.
I have a feeling Shimano changed the cable pull on the front mechs too with Dyna Sys.
Ive figured the problem...its basically the wrong type mech..(/sarcasm on)cheers OnOne for your fantastic advice(sarcasm off/)! Ive just taken the mech off my Crush (the Top Swing type) and hey presto, it works immediately! A PITA but at least it was relatively simple in the end.