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Replacing chain: replace at the same time as rear cluster/cassette. The chain-length is correct when it fits over largest front and rear chainrings, plus one inch. Use an SRAM power-link (simpler).   kellyjones00 (593)

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Chain care: dry lube normally, wet lube (oil) in wet conditions. Try to keep clean to prolong its lifespan.   kellyjones00 (593)

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Gear adjustment: First degrease, clean, and re-lube all moving parts of power-train. The key is first to set cable length per derailleur, then chain-guide position of front derailleur, then high and low maximum positions of each derailleur. Other important tips: keep the bike upright, not upside-down; watch that the chain runs square on each ring; put fine adjustment screws at the end of each cable end into lowest tension (screwed in cl all the way).   kellyjones00 (593)

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Straightening a bent derailleur hanger: one suggestion is to carefully thread the hanger onto a wheel axle nut, then carefully press the hanger against a hard surface (like concrete) using the wheel as a brace. It might work. I had no success with this technique. Hangers are also harder to replace than most bike parts.   kellyjones00 (593)

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