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  1. #1
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    Lasco GOX fat bike crank BB replacement?

    Did a couple quick searches, and found no info on replacement BBs for this crank.

    Anyone find a suitable replacement?

  2. #2
    djrez4
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    Should be a 24mm spindle. The BB depends on the frame as well as the crank. What frame?
    Engearment - Your Gear Concierge

  3. #3
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    I'm jealous of all the guys with 83mm BB fatbikes, but no. 100mm, standard.

    Just curious if anyone knows if they copied Shimano/FSA/RF's style, GXP, or neither.

  4. #4
    djrez4
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    I'll try again.

    What frame?
    Engearment - Your Gear Concierge

  5. #5
    is buachail foighneach me
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    Zowie, you need to know the diameter of the spindle. Diameter of the spindle will dictate your options for replacement. Nearly all fatbikes are 100mm bb shell width nowadays.

  6. #6
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    Sorry guys, I just keep forgetting about all the PF 'standards'.
    It is a standard English BB, the spindle is stepped down at the interface.

    Since no one had info, I pulled the BB and checked it out in detail.

    It almost looks as if the Lasco BB is just a poor tolerance GXP, but I have no info if they are related to another company, or if they're getting sued over it or something. Really, all I know about them is that they make really inexpensive cranks, and their track cranks have lots and lots of pretty colors.

    For those reading this in hopes of usable info, here you go:
    The spindle is approximately a 24 OD on one end, 22 OD on the other, appearing very similar to the GXP BB I compared it to, but with slightly worse tolerances--i.e. the Lasco BB was 22.09mm ID NDS, the GXP was 22.25. ID etc.
    The spline pattern also (roughly) matches.
    The spindle is listed as 133.5mm, but the DS bearing seat to the end of the spindle is actually more like 140mm, and the splines take up approximately 25mm, although the splines are not fully exposed from the BB. So... if anyone knows what that measurement is supposed to define, I'd be interested in hearing what it is.

    Only catch is that the outside of the cups on the Lasco BB are approximately 1.5mm wider than the GXP. Shouldn't be an issue to shim it, however, and perhaps get a little better chain line out of it while I'm at it.

  7. #7
    djrez4
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    24/22 is GXP, so you should be able to use a GXP BB. Length isn't as important because, like you say, you can shim it. 133.5mm sounds like the 100mm shell, plus the BB cups.

    So, on the bright side, you have plenty of options.
    Engearment - Your Gear Concierge

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