Old 01-01-21, 06:43 PM
  #4  
ft3safety
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Location: Northern California, USA
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Thanks Amt0571! I asked a friend with a 12 speed rear derailleur and they told me that from the the center of the axle to the bottom of the rear derailleur swingarm is approximately 24cm on the 12 speed long cage rear derailleur. I measured my 10 and 11 speeds at 21.5cm and 22cm respectively. The dual drives were good but yes I too think they stopped production. My 1x8 with 11-32 doesn't give me the gears I'd like. A 11-51 would be nice...
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