You may have to experiment. What is the max wrap for that derailleur? If your still trying to run the 34 but drop to a 11 with a wide Alpine type triple you may be maxing out the derailleur.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk