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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 10-19-05, 06:06 PM   #1
tntrek52
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Chain skipping

I ride a Trek 1200 road bike. When I am grinding up a hill, it feels like the chain slips a few teeth on the rear gear. Everything looks normal. Any advice?
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Old 10-19-05, 06:17 PM   #2
ChroMo2
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you might have worn out gears on your cassette. to inspect them, look at them and see if they're shaped like an ocean wave instead of a half circle. the chain wears down the tips of the gear lobes and your chain will slip over the teeth when you pedal extremely hard. The chainrings on the crank will wear out eventually too.
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Old 10-19-05, 06:38 PM   #3
schang
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Also check your chain wear... in fact, a chain should wear out faster than the gears it came with, so it's a more likely culprit unless you've already changed your chain once or twice. As usual, Sheldon can tell you the drill: http://www.sheldonbrown.com/chains.html#wear
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Old 10-19-05, 06:57 PM   #4
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Is your rear derailler adjusted properly?
Is your quick release tight?
When you torque the rear may be flexing and allowing the bike to ghost shift on you.
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