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Old 10-05-15, 05:07 PM
  #19  
Jax Rhapsody
Rhapsodic Laviathan
 
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Join Date: Jan 2013
Location: Louisville KY
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Bikes: Rideable; 83 Schwinn High Sierra. Two cruiser, bmx bike, one other mtb, three road frames, one citybike.

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Originally Posted by seedsbelize View Post
Huh?
It's called a sprag unit, or one way clutch. It freewheels one way, and engages when you pedal, so basically pushing a bike backwwrds, the drivetrain pulls aganst the clutch(which is a set of flat spotted roller bearings, or pawls) and engages it. Almost all freewheeling bikes do it. I'd be more worried about the same result forewards.
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