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  1. #1
    mtbr member
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    Single speed bottom bracket width?

    What with should I buy. I know I need a 73 for the shell as that is what the frame measures but how about the spindle width?

  2. #2
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    Depends on your...

    crank. Tell us more. For instance, M952 XTR might take a 112.5mm spindle while an old Shimano DX square taper might take a 122.5mm, both in a 73mm shell.

  3. #3
    "Mr. Britannica"
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    Quote Originally Posted by Nater
    crank. Tell us more. For instance, M952 XTR might take a 112.5mm spindle while an old Shimano DX square taper might take a 122.5mm, both in a 73mm shell.
    also depends on rear hub since you cannot adjust chainline on some, i.e., you gotta match the back... you have some degree of "adjustment" up front by using dif spindle lengths and outside vs. inside position (if no bash ring).

  4. #4
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    Rear Hub = 98' 8/9 speed XT Hub (exact year is a guess) w/ Gusset adapter + 18 tooth ring.
    Cranks = Truvative SS 180mm Cranks.
    Last edited by mtbcyclist; 07-06-2005 at 11:52 AM.

  5. #5
    Doesntplaywellwithmorons!
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    If you center the cog on the rear freehub body, then you should get a straight chainline out of whatever the standard spindle length is for the crank, and running a chainring in the middle ring position.
    I don't post to generate business for myself or make like I'm better than sliced bread

  6. #6
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    From memory...

    I think the Stylos use a 113mm spindle.

  7. #7
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    Thanks. I just ordered a 113 mm bottom bracket.

  8. #8
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    Well.....

    Race Face turbine lp: Phil Wood btm bkt (of course)

    110mm for outer ring chain line
    113 for middle ring chain line

    Eric

  9. #9
    Team SUMMIT BICYCLES
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    As short as possible

    I always use the shortest bottom bracket I can. The main limitation is shoe rub against the chainstays. If you are using a thread on freewheel type hub, you may be limited by your chainline. I usually use the freehub/cog type and always try to get the chainline as inboard as possible. Smaller spindle length is lighter, stronger, less flex, and better Q factor. Having the cog as far inside as possible gives you a less flexy and more powerful drivetrain.
    In can be a limitation to work with 73mm bottom bracket shells. I like to go down to 107mm spindles, but they don't have much room for crank/spindle/bb cup clearance. I have had luck with 73mm shell/107mm Action Tec JIS/Race Face Next LP. Just enough clearance, which is just right!

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