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Shimano cassette sprocket

  • 19-08-2011 2:20pm
    #1
    nitrogen
    Closed Accounts Posts: 698 ✭✭✭


    I recently bought a 12-25 Ultegra cassette, but instead of changing it (Unopened & too lazy to post back), I just want to change the 12 for an 11 (Or take out a 16/17).

    Are they sold separately, because I can't see them listed on Wiggle/CRC? Or am I best return it?

    Thanks


Comments

  • #2
    Hermy
    Moderators, Society & Culture Moderators Posts: 11,489 Mod ✭✭✭✭Hermy


    Harris Cyclery was the only place I ever came across that sold them seperately but I don't think they do this anymore.

    Genealogy Forum Mod



  • #3
    Home:Ballyhoura
    Registered Users, Registered Users 2 Posts: 1,702 ✭✭✭Home:Ballyhoura


    Local bike shops should have lots off sprockets lying around if you check with them, shouldn't be too hard to get one off them.


  • #4
    nitrogen
    Closed Accounts Posts: 698 ✭✭✭nitrogen


    Home:Ballyhoura wrote: »
    Local bike shops should have lots off sprockets lying around if you check with them, shouldn't be too hard to get one off them.

    Ah yes, I forget about those places that also sell bike related stuff.


  • #5
    Paul Kiernan
    Registered Users, Registered Users 2 Posts: 2,216 ✭✭✭Paul Kiernan


    I don't think it's that simple. The cassettes with an 11 cog usually need a 1mm spacer fitted and they have an extra plastic spacer as compared with a 12 cog (4 instead of 3, I think). You'd need to check out the Shimano technical docs on the web!


  • #6
    blorg
    Registered Users, Registered Users 2 Posts: 15,995 ✭✭✭✭blorg


    It is not that simple, change the cassette. If you just swap the smallest cog you will go 11-13-14 while a proper 11T will go 11-12-13-14. Close cogs are more important at the small end.

    Also: you don't need an 11T.


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  • #7
    ratracer
    Registered Users, Registered Users 2 Posts: 3,388 ✭✭✭ratracer


    nitrogen wrote: »
    I recently bought a 12-25 Ultegra cassette, but instead of changing it (Unopened & too lazy to post back), I just want to change the 12 for an 11 (Or take out a 16/17).

    Are they sold separately, because I can't see them listed on Wiggle/CRC? Or am I best return it?

    Thanks

    What did you do with the cassette in the end?


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