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Cranks slip forward on small cog

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Cranks slip forward on small cog

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Old 10-04-09, 04:10 PM
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WashWizards727
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Cranks slip forward on small cog

In the small cog in the back, the cranks will slip forward and make a sort of grinding sound. This only happens when I am in the smallest cog in the rear. When I run through the gears in the stand, they work fine. This problem only arises when somebody is riding the bike (when there is weight on it). The cog doesn't seem to be worn out, so I am confused as to why this is happening.
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Old 10-04-09, 04:13 PM
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Measure the chain. The smallest cogs typically skip first with a worn chain before the larger ones. Cassette wear is hard to tell unless it's extreme. Less teeth being engaged = sliporama.
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Old 10-04-09, 04:13 PM
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did you just install a new casette/ have one installed?
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Old 10-04-09, 04:33 PM
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Is the small cog an 11? If so it needs the special lockring for a first position 11t.
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Old 10-04-09, 05:00 PM
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The chain and cassette don't seem to be worn out. The problem is that while I am riding it, it is hard for me to look under and behind me to see what is happening. What are some other signs of a worn out chain?
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Old 10-04-09, 07:39 PM
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Originally Posted by WashWizards727 View Post
The chain and cassette don't seem to be worn out. The problem is that while I am riding it, it is hard for me to look under and behind me to see what is happening. What are some other signs of a worn out chain?
Signs are a pop up saying measure your chain.
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