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  1. #1
    Senior Member
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    Should i be worried about my bottom bracket?

    My bottom bracket doesn't always feel smooth. I can't hear anything but in my feet I feel a bumpyness. Both pedals, around the entire rotation. It doesn't always do this, just occasionally. Is this a bearing ball that is not smooth? I can be fine with it as long as I'm not messing it up worse by riding it.

    It's a bike shop Schwinn Express '96 or '97. Chromoly frame hybrid.

    Thanks!

  2. #2
    Retro Grouch onespeedbiker's Avatar
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    Assuming it's a sealed cartridge, if the bearings are going, they will continue to degrade until the BB obviously needs replacement; nothing else will be harmed

  3. #3
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    Thanks. I should add that the bike has extremely low miles on it for being that age. Like practically none when I got it and under a thousand now. Always stored inside.

  4. #4
    Senior Member Homebrew01's Avatar
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    Or the crankarms are loose. Can you feel anything loose if you wiggle by hand ? try both sides.
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

  5. #5
    Senior Member
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    Is it the same in all cogs?

  6. #6
    Senior Member
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    your feet are on the pedals, and they have bearings too.

  7. #7
    Senior Member
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    The crank arms don't feel loose when I try to wiggle them. And changing cogs doesn't seem to affect it. I did realize that I only feel it when I'm going really slow. It's just a slight rough feeling... like tiny bumps, not a click, and very consistent as the pedals travel around the circle. I don't think it's the pedals because it feels the same in both feet.

  8. #8
    Senior Member IthaDan's Avatar
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    drop the chain on the bottom bracket shell and then turn the cranks. Best to isolate moving parts.

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