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Old 09-08-10 | 03:18 AM
  #8  
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ftwelder
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From: vermont

Bikes: Many

a front freewheel system is used on trials bikes also. The right crank arms are is threaded for a spin-on type. It's used to gain ground clearance.

http://www.trials-uk.co.uk/files/eco...image-1179.jpg
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