Bike Forums - View Single Post - RS505: Poor shifting going to smaller rear cog
Old 03-10-18, 08:29 PM
Andrew R Stewart 
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More info please. Was the bike new from a shop when you bought it? If used, how much used up? Has the bike ever seen servicing since new?

Your problems could be wear related (chain, pulleys and teeth), incident related (bent hanger, twisted cage) or set up related.

You have the bike so you can see if the shifters use metal cables, wires or liquid filled lines. I suspect you have metal cables. Upgrading will solve a few of the possibilities all at once, if a skilled and motivated wrench does the work. New chain, cassette, shifter, der (and pulleys) and cables that are well installed and tuned will undoubtedly work well. Andy
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