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Old 05-24-19, 09:40 AM
  #4  
bikeme
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Join Date: May 2001
Location: Sunny so. cal.
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I've found that pulling a rear shifter cable too taught doesn't allow the RD's spring to pull chain down to higher gears. After tightening the cable nut with the RD in its high gear position, I give the cable a sideways pull with my hand to get out any slack (if it's not all routed through the downtube like on newer bikes). I then loosen the nut and gently pull the cable end with pliers or just my hand to set it "just" taught then tighten the nut. Anything after that can be taken up with the adjusters. The goal is loose enough to allow RD to pull chain down to higher gears, taught enough for crisp shifts upwards to lower gears.
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