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frankenbike
Indexing question!
My partners bike's gears repeatedly/frequently slip out of index, way quicker than they should, and I can't discover why. I have the same kit on my bike without any issues, so I know what I'm doing with the setup.
Within a week / a few short rides the indexing will be wildly out, to the extent it chatters away furiously / won't stay in any gear.
Any ideas?! We've changed cables, replaced chain and cassette (at same time), and had the hanger alignment checked. Also got a reputable shop to set it all up as was starting to think I must be doing something wrong, but same result a couple of days after collecting it.
Problem doesn't follow the usual rule either of "struggling to get onto bigger sprockets = more cable tension required and vice versa" - once the indexing starts going it isn't happy going up or down the cassette.