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Swapping 9 speed cassette for 10 speed

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  • 14-03-2017 8:49pm
    #1
    jethrothe2nd
    Registered Users Posts: 579 ✭✭✭


    I am going to swap out a 9 speed Sora groupset for a 10 speed 105 which is 2nd hand but seen very little use. Will the cassette fit straight on to the existing hub or will I need a new one?


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    #2
    Pinch Flat
    Registered Users Posts: 7,762 ✭✭✭Pinch Flat


    jethrothe2nd wrote: »
    I am going to swap out a 9 speed Sora groupset for a 10 speed 105 which is 2nd hand but seen very little use. Will the cassette fit straight on to the existing hub or will I need a new one?

    What kind of wheel? Is there a spacer on the existing cassette? If so this would suggest it will take a 10 speed cassette


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    #3
    jethrothe2nd
    Registered Users Posts: 579 ✭✭✭jethrothe2nd


    Pinch Flat wrote:
    What kind of wheel? Is there a spacer on the existing cassette? If so this would suggest it will take a 10 speed cassette

    It's a stock Bontrager wheel that came with the bike (Trek 1.2). It doesn't look like there is a spacer on the existing cassette.


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    #4
    Pinch Flat
    Registered Users Posts: 7,762 ✭✭✭Pinch Flat


    jethrothe2nd wrote: »
    It's a stock Bontrager wheel that came with the bike (Trek 1.2). It doesn't look like there is a spacer on the existing cassette.

    Do you have the tools / know how to pop off the existing cassette? No spacer would suggest it would only take a 9 speed, although a lot of newer bikes should take 10 speed at least.


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    #5
    jethrothe2nd
    Registered Users Posts: 579 ✭✭✭jethrothe2nd


    Pinch Flat wrote:
    Do you have the tools / know how to pop off the existing cassette? No spacer would suggest it would only take a 9 speed, although a lot of newer bikes should take 10 speed at least.

    Unfortunately I don't have the tools to pop it off. I guess I'll have to check with the Lbs although as you say if there is no spacer it would suggest it won't take the 10 speed. Does that mean a wheel rebuild with a new hub then?


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    #6
    clog
    Registered Users Posts: 1,100 ✭✭✭clog


    If it has a 9 speed on it now then it will take a 10 speed, freehub sizes didn't change from 9-10 speed, gaps on cassette just became narrower.


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    #7
    tonytiger81
    Registered Users Posts: 459 ✭✭tonytiger81


    10spd may well fit because, as mentioned above, the cassette is narrower. I bought some cosmic elites about 2 years ago and fitted a 9spd ultegra cassette that did not need spacers though a spacer was provided for fitting 10 spd cassettes. So your wheels might be ok as 10 spd chains/cassettes are narrower vs 9 spds


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