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chainset

  • 05-03-2015 1:20pm
    #1
    jackstaff
    Registered Users, Registered Users 2 Posts: 313 ✭✭


    Quick question .. would an ultegra 6800 11 speed chainset replace a 105 5700 10 speed chainset without issues?

    Thanks in advance


Comments

  • #2
    colm_gti
    Closed Accounts Posts: 2,505 ✭✭✭colm_gti


    Yep


  • #3
    Taxuser1
    Registered Users, Registered Users 2 Posts: 1,689 ✭✭✭Taxuser1


    needs a different bottom bracket cup if i remember rightly when i changed to 6800.


  • #4
    Taxuser1
    Registered Users, Registered Users 2 Posts: 1,689 ✭✭✭Taxuser1


    http://www.wiggle.co.uk/shimano-bb-r60-ultegra-6800105-5800-hollowtech-ii/


  • #5
    colm_gti
    Closed Accounts Posts: 2,505 ✭✭✭colm_gti


    Thought they were all hollowtech 2?


  • #6
    Taxuser1
    Registered Users, Registered Users 2 Posts: 1,689 ✭✭✭Taxuser1


    colm_gti wrote: »
    Thought they were all hollowtech 2?

    honestly, couldnt be sure but i was running 105 and bought 6800 last year - had to exchange existing bb for new.

    more experts on here than me though so don't take my word


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  • #7
    jackstaff
    Registered Users, Registered Users 2 Posts: 313 ✭✭jackstaff


    Yes the existing crank is hollow tech 2


  • #8
    27cyrix
    Registered Users, Registered Users 2 Posts: 126 ✭✭27cyrix


    media1.roseversand.de/cms/technische_infos_en.pdf

    page 2


  • #9
    jackstaff
    Registered Users, Registered Users 2 Posts: 313 ✭✭jackstaff


    27cyrix wrote: »
    media1.roseversand.de/cms/technische_infos_en.pdf

    page 2

    I'm lost


  • #10
    RockWerchter
    Closed Accounts Posts: 202 ✭✭RockWerchter


    Ultegra 6800 bbs have a different outside diameter, which means you need a different tool to install them, but the spindle diameter which they take is the same as older 5700 etc. bbs so it should be fine since the spindle diameter didn't change.


  • #11
    Hauki
    Registered Users Posts: 183 ✭✭Hauki


    I'm going to borrow your thread and ask if I can replace my current 52/39t 105 FC5600 chainset with 105 FC5750 50/34t without any further alterations? I'm running 11-28t in the rear.


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  • #12
    Hauki
    Registered Users Posts: 183 ✭✭Hauki


    Hauki wrote: »
    I'm going to borrow your thread and ask if I can replace my current 53/39t 105 FC5600 chainset with 105 FC5750 50/34t without any further alterations? I'm running 11-28t in the rear.
    Anyone, do I need a new bb?


  • #13
    Muckers
    Registered Users, Registered Users 2 Posts: 504 ✭✭✭Muckers


    Hauki wrote: »
    Anyone, do I need a new bb?

    Cant see why you would.


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