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As this is an older octalink crankset/BB you will require a: Crank Extractor like this to remove the cranks. Bottom Bracket tool like this to remove the bottom bracket. Dust cap removal tool (if it has these) like this 8 or 10mm hex wrench for crank bolts. This is likely to require a lot of effort to free up after 12 years so I'd recommend a repair ...
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