FSA BB-7420ST Bottom Bracket

Discussion in 'Bicycle Mechanics and Repairs' started by RegG, 7 Feb 2016.

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  1. RegG

    RegG Senior Member

    Location:
    Nottingham
    Does anyone know if the FSA BB-7420ST fitted to a friends 2013 Defy 3 (with a FSA Tempo Compact crankset) would be compatible with a Shimano 105 5800 crankset? We are looking to upgrade the groupset on the bike to a full 105.
     
  2. OP
    OP
    RegG

    RegG Senior Member

    Location:
    Nottingham
    I think I've just found the answer to my own question - No! :blush:

    If I am correct, I now believe I would need to replace the BB with a Shimano one - am I right?
     
  3. Citius

    Citius Guest

    yes.
     
  4. HarryTheDog

    HarryTheDog Veteran

    Location:
    Basildon Essex
    You dont have to buy a shimano BB there are plenty that are compatible, FSA BB6000 for example, however easier to go with say a shimao 5700 BB which is cheaper and prabably last longer than the FSA.
     
  5. OP
    OP
    RegG

    RegG Senior Member

    Location:
    Nottingham
    Thanks for the replies. My friend is looking at a 105 5800 groupset which appears to come complete with a BB so maybe that would fit in place of the FSA BB......
    He is also aware that a wheel upgrade to an 11 speed hub will be necessary.
     
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