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-   -   Largest Cog (https://www.bikeforums.net/bicycle-mechanics/226068-largest-cog.html)

rockpilex 09-06-06 11:15 AM
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)?

Retro Grouch 09-06-06 11:41 AM
32 will work for sure and my bet is it'll handle a 34 too.

moxfyre 09-06-06 04:05 PM
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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