Every now and then the chain on my F1000 will slip when pedaling hard or going up hills in the higher gears? Any idea what the cause might be? It feels to me like it's slipping in the back but the cassette looks like its in good shape. On the chain rings (Coda) there are a couple of teeth filed down but that's to "aide shifting" as coda puts it and shouldn't cause the chain to slip. Any ideas?
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Thread: Causes of chain slippage?