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Drive train problem, need help identifing the problem

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Drive train problem, need help identifing the problem

Old 07-05-06, 12:45 PM
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Bolo Grubb
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Drive train problem, need help identifing the problem

It happened this morning while riding. Standing while pedaling and suddenly it was like there was no chain, but only for a second. Then there was tension on the chain again.

This happened several times through out the ride and seems to get worse as the ride went on.

Is this a freewheel problem?

thanks for your help
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Old 07-05-06, 12:53 PM
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Could be derailleur adjustment, or worn chain/freewheel.
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Old 07-05-06, 12:57 PM
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Bolo Grubb
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only 300 miles on the casstte and freewheel, 1,000 miles on the chain. Derailleur was adjusted 300 miles ago with the new wheel set
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Old 07-05-06, 01:37 PM
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skipping a cog here and there?
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Old 07-05-06, 02:04 PM
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This has happened to me only twice. Once when it was -5 deg outside and the pawls wouldn't engage, but it's summer now. The second time it was because of worn-to-nubs teeth on my chainring causing slippage.
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Old 07-05-06, 06:31 PM
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ok a LBS mechanic thinks it is just a badly streched cable and worn chain. The chain only has 1,000 but we did find a link that is about to come apart.

So a new chain, new shift cable and housings. Should have the bike back midday tomorrow.
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Old 07-05-06, 07:20 PM
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As a warning, you might need to still replace the cogset... I had a bike with 600 miles or so on the original chain and cassette, built a new wheelset with a new casseteand put another 400 or so on THAT.... Out of habit I replaced the chain since it was showing signs of wear.... It actually -caused- more problems because of the classic 'new chain, worn sprockets' problem... Especially in the case of 9 speed drivetrains, I know a lot of people who replace their chain every 800 miles or so.
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