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Thread: Largest Cog

  1. #1
    Senior Member rockpilex's Avatar
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    Largest Cog

    I own an early '90s Trek 520 with Deore DX front and rear derailleurs. The bike needs a new cassette, chain and chainrings. My question is -can my Deore dx rear derailleur handle a cassette that includes a 32 or 34 tooth cog (largest cog on bike now is 28 tooth)?

  2. #2
    Senior Member Retro Grouch's Avatar
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    32 will work for sure and my bet is it'll handle a 34 too.

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    cyclist/gearhead/cycli... moxfyre's Avatar
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    Quote Originally Posted by rockpilex
    I own an early '90s Trek 520 with Deore DX front and rear derailleurs. The bike needs a new cassette, chain and chainrings. My question is -can my Deore dx rear derailleur handle a cassette that includes a 32 or 34 tooth cog (largest cog on bike now is 28 tooth)?
    As RG says, 32 almost certainly, 34 probably. You might want to ask this question to Sheldon "Encyclopedic Knowledge of Past and Present Components" Brown
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