Old 08-21-19, 04:47 AM
  #13  
SHBR
C*pt*i* Obvious
 
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Its normal for me on short bursts.

Most people crouch a bit when they are pushing hard, its more efficient than standing, and easier to wind up to a high cadence. (120+ RPM)

Riding the rivet is usually combined with "gnawing on the stem", not a pretty sight.
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