Thread: Used Trek 520 — what to look out for
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Old 07-24-20, 01:01 PM
  #27  
fietsbob
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Shimano UN type cartridge bearing the number is common British thread so left hand threaded on the right side..

https://www.parktool.com/product/bottom-bracket-tool-bbt-22?category=Crank%20%26%20Bottom%20Bracket
or
https://www.parktool.com/product/bot...ttom%20Bracket
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