Cycling Equipment · Public discussion

Correct square-taper BB size?

Started by Boyd Speerschne · · Last activity · 10 posts · 732 views

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Cycling Equipment
Published
7 June 2004
Last activity
9 June 2004
Original author
Boyd Speerschne
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10
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  1. Hello,

    I recently purchased an '04 Specialized S-Works E-5
    frame. I didn't know the correct size for the bottom
    bracket, so I called Specialized (it wasn't on their
    website... go figure).

    They told me it takes 68mm cups and they gave me two options
    for the spindle length:

    1) 109.5mm for Shimano Octalink
    2) 108.0mm for ISIS

    The problem is that the crankset I want to use is an old
    school square- tapered design.

    What size BB should I get?

    Thanks in advance,

    - Boyd S.

  2. "Boyd Speerschneider" <bspeerscREMOVE_ME@ME_TOOyahoo.com> wrote in message
    "]news:[email hidden]...

    Quoted message said:

    Hello,

    I recently purchased an '04 Specialized S-Works E-5 frame.
    I didn't know the correct size for the bottom bracket, so
    I called Specialized (it wasn't on their website... go
    figure).

    They told me it takes 68mm cups and they gave me two
    options for the


    spindle

    Quoted message said:

    length:

    1) 109.5mm for Shimano Octalink
    2) 108.0mm for ISIS

    The problem is that the crankset I want to use is an old
    school square- tapered design.

    What size BB should I get?

    Thanks in advance,

    - Boyd S.

    It depends on the crankset you will be using. If the crank
    uses OctaLink, you have to use the OctaLink bottom bracket.
    The same holds true for the ISIS, if using ISIS cranks,
    using an ISIS bottom bracket is necessary.

  3. "Dave Thompson" <[email hidden]> wrote in message
    "]news:[email hidden]...

    Quoted message said:


    "Boyd Speerschneider" <bspeerscREMOVE_ME@ME_TOOyahoo.com>
    wrote in message
    "]news:[email hidden]...

    Quoted message said:

    Hello,

    I recently purchased an '04 Specialized S-Works E-5
    frame. I didn't know the correct size for the bottom
    bracket, so I called Specialized (it wasn't on their
    website... go figure).

    They told me it takes 68mm cups and they gave me two
    options for the


    spindle

    Quoted message said:

    length:

    1) 109.5mm for Shimano Octalink
    2) 108.0mm for ISIS

    The problem is that the crankset I want to use is an old
    school square- tapered design.

    What size BB should I get?

    Thanks in advance,

    - Boyd S.

    It depends on the crankset you will be using. If the crank
    uses OctaLink, you have to use the OctaLink bottom
    bracket. The same holds true for the ISIS, if using ISIS
    cranks, using an ISIS bottom bracket is necessary.

    Sorry, I didn't completely read your post. Disregard
    my drivel.

  4. Boyd Speerschneider' bspeerscREMOVE_ME@ME_TOOyahoo.com said:

    What size BB should I get?

    The axle length depends entirely on the model of crank you
    want to use.

    James Thomson

  5. Boyd Speerschneider said:

    I recently purchased an '04 Specialized S-Works E-5 frame.
    I didn't know the correct size for the bottom bracket, so
    I called Specialized (it wasn't on their website... go
    figure).

    They told me it takes 68mm cups and they gave me two
    options for the spindle length:

    1) 109.5mm for Shimano Octalink
    2) 108.0mm for ISIS

    The problem is that the crankset I want to use is an old
    school square- tapered design.

    What size BB should I get?

    Depends on the crank you choose. I have a Web page with a
    lot of information on this: sheldonbrown.combbsize

    Sheldon "Chiffres" Brown +--------------------------------------------------------
    ---------+
    | I'll be traveling in France and England throughout the
    | month | of June. I hope to remain online, but don't know
    | what sort | of 'Net access I'll be able to get... |
    +-----------------------------------------------------------
    ------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-
    9772 FAX 617-244-1041 harriscyclery.comharriscyclery.com Hard-to-find
    parts shipped Worldwide captainbike.comcaptainbike.com
    sheldonbrown.comsheldonbrown.com

  6. Sheldon Brown <[email hidden]> wrote in news:40C4AFB8.108
    @sheldonbrown.com:

    Quoted message said:
    Quoted message said:

    What size BB should I get?

    Depends on the crank you choose. I have a Web page with a
    lot of information on this: sheldonbrown.combbsize

    Sheldon "Chiffres" Brown +--------------------------------------------------------
    ---------+
    | I'll be traveling in France and England throughout
    | the month | of June. I hope to remain online, but
    | don't know what sort | of 'Net access I'll be able to
    | get... |
    +---------------------------------------------------------
    --------+ Harris Cyclery, West Newton, Massachusetts Phone
    617-244-9772 FAX 617-244-1041 harriscyclery.comharriscyclery.com Hard-to-
    find parts shipped Worldwide captainbike.comcaptainbike.com
    sheldonbrown.comsheldonbrown.com

    Sheldon, I really appreciate your help. However, the
    crankset I want to use is a Coda (Cannondale) about which
    there is no info on your site. Any words of wisdom you might
    offer in figuring out the correct size BB would be very
    appreciated.

    - Boyd S.

  7. Boyd Speerschneider <bspeerscREMOVE_ME@ME_TOOyahoo.com>
    wrote in message
    news:<[email hidden]>... <snip>

    Quoted message said:

    Sheldon, I really appreciate your help. However, the
    crankset I want to use is a Coda (Cannondale) about which
    there is no info on your site. Any words of wisdom you
    might offer in figuring out the correct size BB would be
    very appreciated.

    - Boyd S.

    Ah ha! The missing information is revealed. Try this:
    1. Put a BB on the bike and install the right crank.
    2. Line up the centerline of the crank with the center of
    the cassette.
    3. If the crank is too far out, get a shorter spindle.
    4. If it's too far in, get a longer spindle.

    This assumes that there is sufficient clearance for the
    chainrings in step 3. Fudging outward a millimeter or two is
    allowable. This tool may help with getting things lined up:
    parktool.comclg2.shtml

    Jeff

  8. Boyd Speerschneider said:

    However, the crankset I want to use is a Coda (Cannondale)
    about which there is no info on your site. Any words of
    wisdom you might offer in figuring out the correct size BB
    would be very appreciated.

    Use whatever length BB places the big ring of a double
    crank, or the middle ring of a triple crank, at 45mm from
    the centerline of the frame. If this placement causes
    clearance issues between the rings and the frame, increase
    the spindle length as much as necessary to gain adequate
    clearance.

    Chalo Colina

  9. bspeers-<< The problem is that the crankset I want to use is
    an old school square- tapered design. >><BR><BR>

    Which crank is it?

    Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St.
    Boulder, CO, 80302
    (303)440-3535 vecchios.comvecchios.com "Ruote convenzionali
    costruite eccezionalmente bene"

  10. [email hidden] (Qui si parla Campagnolo ) wrote in
    :"]news:[email hidden]:

    Quoted message said:

    Which crank is it?

    Its a black Coda (Cannondale) 175mm double road crank.
    Don't ask me which bike it came off of or what year as I
    have no clue. I got it for a pretty good price on eBay a
    long time ago.

    Thanks for your help,

    - Boyd S.

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