Thread: SRAM Rival 1 rear derailer replacement: NX?
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Old 04-03-23, 11:09 PM
  #6  
tFUnK
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I think the X-Horizon refers to something else; Exact Actuation and X-Actuation refer to the pull ratios. The Apex RD will work (expand the specifications tab and you'll see the pull ratio is Exact Actuation).
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