Trek Madone - which BB??

rudivoller22
rudivoller22 Posts: 492
edited January 2014 in Road buying advice
Hi
Sorry for what may be a stupid question, but I ave a 2007 Madone which i'm lookiong to get a new groupset for. It currently has Ultegra but lookign to switch to SRAM. I know the BB is the trek 90mm pressfit and it obviously takes hollowtech II as it currently has shimano on it, but can anyone tell me if it will take GXP or BB30 in terms of the SRAM options? Have done a quick search but can's seem to find a difinitive answer. Is GXP basically the same size as Hollowtech II and so compatible with each other??

Cheers

Comments

  • ugo.santalucia
    ugo.santalucia Posts: 28,309
    I would assume it has a threaded bottom bracket and won't therefore take press-fit bearings... which is great news, as the latter are rubbish
    left the forum March 2023
  • rudivoller22
    rudivoller22 Posts: 492
    ugo.santalucia wrote:
    I would assume it has a threaded bottom bracket and won't therefore take press-fit bearings... which is great news, as the latter are rubbish

    Quick look on Trek site, it just says 90mm integrated BB.
  • majormantra
    majormantra Posts: 2,094
    Are you sure it's BB90? I'm not saying it isn't, but I think only the high end models had it back in 2007 so it may not.

    If it is, you need the GXP bearing kit: http://www.trekbikes.com/pdf/owners_man ... 062309.pdf

    You cannot fit a BB30 crank in a BB90 frame.

    If it's threaded, you just need an English threaded GXP bottom bracket.
  • rudivoller22
    rudivoller22 Posts: 492
    MajorMantra wrote:
    Are you sure it's BB90? I'm not saying it isn't, but I think only the high end models had it back in 2007 so it may not.

    If it is, you need the GXP bearing kit: http://www.trekbikes.com/pdf/owners_man ... 062309.pdf

    You cannot fit a BB30 crank in a BB90 frame.

    If it's threaded, you just need an English threaded GXP bottom bracket.

    It's a Madone 5.2 - looks like BB90 from the website but I may be wrong
  • rudivoller22
    rudivoller22 Posts: 492
    rudivoller22 wrote:
    MajorMantra wrote:
    Are you sure it's BB90? I'm not saying it isn't, but I think only the high end models had it back in 2007 so it may not.

    If it is, you need the GXP bearing kit: http://www.trekbikes.com/pdf/owners_man ... 062309.pdf

    You cannot fit a BB30 crank in a BB90 frame.

    If it's threaded, you just need an English threaded GXP bottom bracket.

    It's a Madone 5.2 - looks like BB90 from the website but I may be wrong

    Thanks for the help by the way. I've just ordered a sram red groupset GXP and will just get the lbs sort out the BB.
    Thanks
  • majormantra
    majormantra Posts: 2,094
    You're welcome. I think you're right that it's BB90 btw. The 5.2s did have it in 2007.

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