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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 04-12-12, 10:57 AM   #1
pauschl
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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!
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Old 04-12-12, 11:21 AM   #2
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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
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Old 04-12-12, 01:52 PM   #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.
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Old 04-12-12, 01:53 PM   #4
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Or the crankarms are loose. Can you feel anything loose if you wiggle by hand ? try both sides.
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Old 04-12-12, 06:24 PM   #5
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Is it the same in all cogs?
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Old 04-12-12, 07:17 PM   #6
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your feet are on the pedals, and they have bearings too.
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Old 04-13-12, 09:32 PM   #7
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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.
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Old 04-13-12, 09:46 PM   #8
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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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