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Thread: Pg-950

  1. #1
    Senior Member lemak's Avatar
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    Pg-950

    i have an 09 CAAD 9-6 and was wondering if it is possible to change out the rear cassette to the sram pg 950 11-28. it currently has the sram 12-26 cassette that came from the factory. if it is possible will the tiagra rear derailleur be able to handle it?

    Thanks

  2. #2
    Great State of Varmint Panthers007's Avatar
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    You may have to perform a minor adjustment on your rear-derailleur. Other than that, you're good to go. I prefer the 970 SRAM cassettes - smoother and nicer shifts.

    The Tiagra RD will handle this with room to spare.
    How do you keep an idiot in suspense?

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    Check the big/big combo out on a workstand before you find out the hard way out on the road that the chain is too short after the addition of a larger cog. It likely will have plenty of length to handle two extra teeth but you don't want to bet your frame/face on it.

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    Senior Member lemak's Avatar
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    Quote Originally Posted by Panthers007 View Post
    You may have to perform a minor adjustment on your rear-derailleur. Other than that, you're good to go. I prefer the 970 SRAM cassettes - smoother and nicer shifts.

    The Tiagra RD will handle this with room to spare.

    i looked and wasnt able to find the sprocket combo that i want in the 970. is it available in 11-28?

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    Great State of Varmint Panthers007's Avatar
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    I don't know if they make it in this size. Check the SRAM website.

    joejack is correct - You may need a new chain to go with the new cassette. Usually when installing a new cassette, the chain needs replacing, too.
    How do you keep an idiot in suspense?

  6. #6
    Senior Member lemak's Avatar
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    thanks everybody!

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    Quote Originally Posted by Panthers007 View Post
    I don't know if they make it in this size. Check the SRAM website.

    joejack is correct - You may need a new chain to go with the new cassette. Usually when installing a new cassette, the chain needs replacing, too.
    If the "stretch" on the chain is 1/16" or less per 12 links, you shouldn't have to. If the chain is worn 1/8" or more, you definitely will.

    Since his bike is so new, there's a fair chance he's OK.

  8. #8
    hup
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    I swapped out a 12-26 to an 11-28 with a 105 short cage and it works fine with no chain swap (50-36 compact crankset). I did find some shifts to be slightly more noticeable that they were before, but all in all I'm happy with the result.

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