Thread: Does the "B Screw" really do anything?
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Old 06-07-18 | 01:36 PM
  #28  
evan326
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From: RVA

Bikes: 2013 Cannondale Synapse 6 Tiagra + 2016 Cannondale CAAD 12 Dura Ace

Originally Posted by rydabent
False. The "B" screw is NOT a chain tension adjustment. It is to adjust the clearance between the jockey wheel and the largest sprocket on the free wheel.
http://si.shimano.com/pdfs/dm/DM-RARD001-04-ENG.pdf
Page 18 begs to differ
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