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Thread: Bottom bracket

  1. #1
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    Bottom bracket

    Question on Sram/Truvativ BB, I have an offset frame and a Howitzer triple crankset. I have to replace the BB bearings. Will the replacement cups for GXP 68/73 bottom brackets work with the 100mm spindle for my cranks?

  2. #2
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    Correct GXP will work, copied from another thread on the UK Fatbike forum, these are what you want - 37mmx22mm:

    OUTBOARD BB UPGRADE KIT FOR GXP - 23.99 : mbbearings.co.uk, Frame Hub Bearings

  3. #3
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    Quote Originally Posted by Flying_Scotsman View Post
    Correct GXP will work, copied from another thread on the UK Fatbike forum, these are what you want - 37mmx22mm:

    OUTBOARD BB UPGRADE KIT FOR GXP - 23.99 : mbbearings.co.uk, Frame Hub Bearings
    That looks like just a bearing replacement kit for GXP.
    I am pretty sure the Howitzer uses wider bearings than GXP. If the spindle size is the same, you might be able to use the whole cups from a GXP though, which would save some weight.

  4. #4
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    Should I be looking for a the Howitzer BB that is described as "100 + E 66mm chain line?" I assume the "E" is for the e type derailleur? Are the puglseys a 66mm chain line?

  5. #5
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    Yes, that is the one you need if you have Holzfeller or Husselfelt cranks made 2006 and up. the chainline on a 135mm offset by 17.5mm(pugsly) or a 170mm centered bike is ideally about 66mm.

    before that, I think they were ISIS splined, so you would need an ISIS BB from any manufacturer. I think these cranks say ISIS on them. I don't theink the Howitzer ones say anything, but the Bottom bracket cups have it written on them.

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