Old 10-27-08, 01:05 PM
  #9  
Trogon
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Location: central rio grande valley
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Bikes: 14 road, 1 SS, 2 MTB

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You beat me to the question.

The only two designs I've seen are either cartridge (FSA, Cane Creek) that ride in the frame (or sometimes in a liner) or Campy which uses ball bearings in a ring that roll in pressed cups.
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