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Old 03-12-11, 09:54 PM   #1
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Vibrations when pedaling hard

So I had just gotten off a trail near my house and while I was pedaling I heard a "pop" now every time I pedal with some force the bike vibrates. Any ideas guys? Thanks in advance.

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Old 03-12-11, 10:04 PM   #2
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Pop? Might be a spoke... vibrations can be caused by chainring wear and a new chain.
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Old 03-13-11, 01:04 PM   #3
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While chainwear can cause vibration, it wouldn't have a sudden onset. Look for something broken or moved, either a broken spoke, or possibly a broken rear axle that allows the rear wheel to move slightly and rub under high chain tension.

You might check the axle.wheel movement theory by standing on a pedal with the front brake locked and watching for deflections in the wheel.
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