Old 04-22-07, 09:00 PM
  #9  
simplify
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Join Date: May 2005
Location: San Diego
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Bikes: Cannondale R300 Caad2

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Originally Posted by JunkYardBike
One thought I have is that because the spindle and cups are one piece, and the the bearings only apply pressure to the inside of the cartridge body, there is less of a need to secure the cups. On an adjustable cup bearing assembly, the bearing balls are constantly working on the cups independent of the spindle. There's no body to hold it together.
I think that's exactly right, in fact Sheldon Brown has mentioned that before on these forums. That's why cartridge BB's put less stress on the threads of the shell, and are therefore often a good solution for shells that have had their threads compromised in some way, previously.
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