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Thread: Bottom Bracket

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    Bottom Bracket

    I decided to clean and lube my bottom bracket on a 1987 trek 330

    The crank and bottom bracket is (SR) Sakae Ringyo.

    The measurements have me curious

    The spindle overall measures 117mm the left side measures 32mm and the right side measures 33.5mm

    most spindles that I see that are offset usually measure at least 5mm longer on the right side.

    Would a company actually go to the trouble of making an offset spindle for 1.5mm? Or could it be possible that their tolerances are off that much?

    Last edited by sloride; 01-28-09 at 10:21 PM.

  2. #2
    DOS
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    It would seem they are made with that small amount of assymetry. See second item under Japanese BBs in Sheldon's database. http://www.sheldonbrown.com/bbsize.html

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    Great State of Varmint Panthers007's Avatar
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    After you have cleaned everything, do put some Locktite (or similar) on that fixed-cup.
    How do you keep an idiot in suspense?

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    Real Men Ride Ordinaries fuzz2050's Avatar
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    Quote Originally Posted by Panthers007 View Post
    After you have cleaned everything, do put some Locktite (or similar) on that fixed-cup.
    Why exactly would you want to make a fixed cup even harder to remove? If it's in a Trek, it's not Swiss threaded or anything crazy like that.

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    DOS

    Thanks for the link.


    This one must be it 3K size code 68-shell 117.5 overall 32 left 52 middle 33.5 right 119 symmetrical equivalent. The SR spindle size code is 3A instead of the 3K but the measurements are correct. Also 119 symmetrical equivalent is interesting. Would this mean that an upgrade to a cartridge bottom bracket would be as simple as finding a 68mm B/B with a 119mm spindle?

    Panthers007

    Thanks for the info. I've already cleaned and lubed it and put it back in. I put anti seizing lube on the threads. I didn't think about locktite. I'll check the fixed side often and add locktite if I notice it loosening up. Thanks

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    Great State of Varmint Panthers007's Avatar
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    You're quite welcome. Enjoy.
    How do you keep an idiot in suspense?

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    Senior Member Bill Kapaun's Avatar
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    Quote Originally Posted by sloride View Post
    This one must be it 3K size code 68-shell 117.5 overall 32 left 52 middle 33.5 right 119 symmetrical equivalent. The SR spindle size code is 3A instead of the 3K but the measurements are correct. Also 119 symmetrical equivalent is interesting. Would this mean that an upgrade to a cartridge bottom bracket would be as simple as finding a 68mm B/B with a 119mm spindle?
    Correct! It's actually listed in the far right column on Sheldon's page that's referenced above.

    Don't assume the "long" side is always the drive side.
    I revently picked up an 86? Diamondback FleetStreak that uses the "S". The short side was on the crank. I guess they just used the same spindle on everything and used the "long" side for the triples? Else it may have been an "incorrect" replacement?

    Loose Screws still has the "S" type spindles & cups available. They have different dimensions listed than Sheldon though?
    http://www.loosescrews.com/index.cgi...d=495787923176
    http://www.loosescrews.com/index.cgi...d=495787923176

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    Bill

    Thanks for the links. I made sure I oriented the spindle properly. The long side is the right side on this spindle.

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