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  1. #1
    Senior Member aeonderdonk's Avatar
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    DA 7800 Bottom Bracket - How long until death?

    So it looks like my BB is going, or so I assume. About every 2nd full crank revolution I can feel a click/hitch in the BB. How long for this world do you think it is? I've ordered a replacement but wondering how I can keep riding on it until it NEEDS to be replaced and what adversely may happen if I ride too long on it?

    Sorry for being a n00b.

  2. #2
    <3s bikes Re-Cycle's Avatar
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    How many miles on the BB and has it seen any rain? Also is it possible that your non-drive side crank is loose or that the cups are not tight in the frame?
    A wild man once explained to me how bicycles came from sailboats.

  3. #3
    Senior Member aeonderdonk's Avatar
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    I bought the bike used so I'm not sure. It's seen about 2500 miles from me, and probably anywhere from 2-10k miles from previous owner.

    I suppose most anything is possible, I can check for tightness of the arm/cups.

  4. #4
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    The newer external BB's are not as durable as the original square taper cartridge types. I have replaced them for friends, but I don't know much milage they got from them.
    You can ride it until the noise drives you to replace it without damaging the crank.axle.

  5. #5
    Senior Member CACycling's Avatar
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    You can pull them, pop off the seal, flush them out, lube and reinstall. Make sure you grease the shaft where it contacts the bearings before installation.

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