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Old 05-17-19 | 07:59 AM
  #8  
fietsbob
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Joined: Jun 2010
Posts: 43,586
Likes: 1,380
From: NW,Oregon Coast

Bikes: 8

best is a parallel line thru center of rear cogs* & middle chainring.

* 3 of 5, 4 of 7 , (odd #) etc. or gap between , 4&5 of 8, (even #)

parallel to centerline of bike ..
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