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  1. #1
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    9 spd cassette compatability

    I currently have a Tiagra HG50 9 spd 12/25.

    http://bike.shimano.com/media/techdo...9830608763.pdf

    I want to get a little lower gearing and I thought about a HG80 11-28.

    http://harriscyclery.net/itemdetails.cfm?id=732

    I don't think there should be a problem, but I am still confused about the 11 tooth. Does it use a different lockring?

  2. #2
    Senior Member
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    The lock ring comes with the cassette, use the same tool to put it on that you use to take off the HG50.

  3. #3
    Senior Member
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    FYI: Your rear derailer might not clear 28T, if it is a shimano road derailer it is only guaranteed to work with 27T. That said, it probably won't be a problem, I am pretty sure there are people around running 29T.
    Surly Pacer

  4. #4
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    I have a long cage Tiagra rear derailleur, so I shouldn't have a clearance problem. Thanks.

  5. #5
    Senior Member
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    Quote Originally Posted by allroy71 View Post
    I have a long cage Tiagra rear derailleur, so I shouldn't have a clearance problem. Thanks.
    The length of the derailleur cage has nothing to do with big cog clearance. A long cage Tiagra will most likely clear a 28t cog, but so will a short cage.

    Al

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