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Upgrading from Claris to 105 - does BB need changing?

samfailedsamfailed Posts: 82
in Workshop
Looking to upgrade a bike from Shimano Claris to Shimano 105. Plan to change everything; front and rear derailleurs, shifters, crankset, brakes and new wheels that take 11-speed cassettes, but do I need to change the bottom bracket to accommodate a different crankset?

Posts

  • elbowlohelbowloh Posts: 7,078
    You shouldn't have to, no.
    Felt F1 2014
    Felt Z6 2012
    Red Arthur Caygill steel frame
    Tall....
    www.seewildlife.co.uk
  • imposter2.0imposter2.0 Posts: 12,015
    If Claris uses a square taper BB (which I think it does), then yes, you will need to change the BB.
  • elbowlohelbowloh Posts: 7,078
    edited February 2021
    Claris has been hollowtech II since 2017. So, if the bike is younger than that, you won't need a new BB.

    Have you got a picture?
    Felt F1 2014
    Felt Z6 2012
    Red Arthur Caygill steel frame
    Tall....
    www.seewildlife.co.uk
  • Harry182Harry182 Posts: 1,169
    I misread this as "Upgrading from Chorus to 105"!

    Have since calmed down and put back the popcorn.
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