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  1. #1
    Your killing my Strava
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    When to replace a cassette

    I have 3,600 miles on my 07 Stumpy. when would be a good time to replace the chain and cassette? It came stock with a Shimano Hg-50, 9spd, 11/34. What would be a good upgrade? Same with the chain. What do you recommend?
    Last edited by vinnyl26; 07-27-2011 at 07:21 AM.

  2. #2
    Former Bike Wrench
    Reputation: mtnbiker72's Avatar
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    Measure the chain stretch with a tape measure or ruler pin to pin

    12" new
    12 1/16" replace chain
    12 1/8" likely need to replace cassette too
    12 1/4" look at a whole new drivetrain

  3. #3
    Your killing my Strava
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    Quote Originally Posted by mtnbiker72 View Post
    Measure the chain stretch with a tape measure or ruler pin to pin

    12" new
    12 1/16" replace chain
    12 1/8" likely need to replace cassette too
    12 1/4" look at a whole new drivetrain
    I am at 12 1/4" why a whole new drive train?? Rear derailer and front sprockets too??

  4. #4
    Former Bike Wrench
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    If you allowed your chain to wear out this much, you other drivetrain components have also worn this much. You may only have to replace individual chainrings depending on if you spend most of your time in one or two. Putting a new chain on these very worn chainrings can often lead to skipping and chainsuck.

    By drivetrain I was not referring to the derailluers, though you might check the condition of the pulleys.

  5. #5
    Your killing my Strava
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    Ok I think tomorrow I will get a new chain cassette and middle and small front chain rings,,,any recommendations for a cassette

  6. #6
    Former Bike Wrench
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    Cassettes often depend on what type of hub you use and if weight is important. If you have a hub with a steel freehub body (Shimano or similar) and weight isn't an issue then the Shimano HG61 is a very solid and durable cassette. If weight is a concern and/or you own a premium rear hub with an aluminum freehub body then a Shimano XT or SRAM PG990 cassette is a wise choice.

    Chain wise I like KMC X series chains, very strong and durable and come with a quick connect.

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