I am having a problem with my front derailleur not shifting to the granny ring immediately before or during climbs (i.e. under load) and am wondering if anyone has suggestions.
I did not have this problem (particularly with shifting just before climbs) until I recently replaced my granny ring, middle ring and chain. I kept the same type and size of components (i.e. tooth count, chain length). I also replaced the cable and cable housing and readjusted the derailleur but am still having the problem.
I know that front derailleurs often have trouble shifting under load and that a good technique is to shift before climbing, but the derailleur wont shift even on the slightest incline. I am trying to figure out why the problem would start after I install new chainrings and chain.
The interesting thing is that the previous drivetrain components shifted better even though I had incorrectly installed the middle ring (I had bolted it on with the small guide tab not aligned with the crankarm so the ramps and pins where not in the correct locations).
Could it just be a sign that I need a new front derailleur? The current one is 2 years old.
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