• Quick evening shot of new build-up. Currently 6600 with 170mm 6600SL cranks, ksyrium elites and contis. I find that every now and then when shifting from the small up to the big chainring the chain overshifts and drops. Could it be my derailleur toe in/out, chain too short or the fact I'm using a DA 7901 chain (uni directional?)

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