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Chain jumps and sometime get stuck

Old 06-10-20, 07:29 AM
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nvs
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Chain jumps and sometime get stuck

Sometime when I apply pressure to the pedals while riding, the chain jumps from the plates, One day it got stuck when I was pushing on one foot, I went over the bar and fell pretty bad.

What could it be? I changed the chain because it was stretched and somebody told me that it could be the cause. The problem persist, I even stopped using the middle plate which is the one I always use.
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Old 06-10-20, 07:57 AM
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Originally Posted by nvs View Post
Sometime when I apply pressure to the pedals while riding, the chain jumps from the plates, One day it got stuck when I was pushing on one foot, I went over the bar and fell pretty bad.

What could it be? I changed the chain because it was stretched and somebody told me that it could be the cause. The problem persist, I even stopped using the middle plate which is the one I always use.
Search for chain/chainring wear. If the entire drivetrain is so worn out, a new chain won't help. You'd have to also replace the chainring and cassette.
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Old 06-10-20, 02:05 PM
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You might have a worn out chainring (what you called a plate) or your rear cogs might be worn out. Standard practice when replacing a worn out chain is to replace the rear cogs too.

Cheers
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Old 06-10-20, 02:16 PM
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This question is impossibly vague. What sort of bicycle are you asking about? Be very very specific. The more information the better the answer. Bicycles do not use "plates" for the chain. Replacing a worn chain can accentuate the problems caused by wear to freewheel/cassette cogs and to chainrings("plates"). Knowing the bike you are dealing with will go a long way towards finding a good solution
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Old 06-12-20, 01:30 AM
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Originally Posted by tomtomtom123 View Post
Search for chain/chainring wear. If the entire drivetrain is so worn out, a new chain won't help. You'd have to also replace the chainring and cassette.
Thanks, The chainring is indeed worn out in the middle, the cassette looks better. I'm currently testing the whole rear wheel from my wife's bike and it looks good.
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Old 06-12-20, 09:24 AM
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You said you put a new chain on it, didn't you? Did you size the chain to the old chain? Chains are sold longer than what most bike need. Too long a chain can mean the rear derailleur can't keep enough tension on it and falling off the front chain ring can be a result sometimes.

If your bike isn't high mileage with 20,000 miles on it, then I'd think it unlikely your chain ring worn out. There is a lot of shaping and sculpting of the chain ring teeth to help it shift better in the front and some teeth can look worn out if you aren't comparing to a new ring of the same model.

Still....................what bike do you have? If you only have a criterium bike, then we can eliminate quite a few potential solutions.
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Old 06-12-20, 09:30 AM
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Originally Posted by Miele Man View Post
Standard practice when replacing a worn out chain is to replace the rear cogs too.

Cheers
Not where I live: money doesn't grow on trees here!
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Old 06-12-20, 09:48 AM
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Originally Posted by Chuckles1 View Post
Not where I live: money doesn't grow on trees here!
Ever hear the saying, "Penny wise and pound* foolish"? That can apply to chains, freewheels or cassettes. Put a new chain on a badly worn cassette or freewheels and if it works (highly unlikely) you'll get rapid wear on the chain and cogs and will end up having to replace them a lot sooner. Or the chain can skip at an inopportune time and cause an accident. Yes, you save a bit by not replacing the cassette/freewheel when you replace a badly worn chain but at the least you'll probably have to make another trip to the shop for the cassette/freewheel when the new chain skips badly.

Cheers

*pounds = an English form of money.
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Old 06-12-20, 10:56 AM
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So how much in almost sixty years of riding will I save by also replacing the cassette and maybe chain rings? I've only had to replace one or two chains? Maybe three at the most?

I don't think any were on the same bike.
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Old 06-12-20, 11:01 AM
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Miele Man Or you can just admit that you wrote nonsense. Standard practice is to replace *chain* when you replace worn out cassette, not other way around. You'll need to replace cassette only if it'll start skipping with the new chain.
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Old 06-12-20, 12:31 PM
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Yeah, I do have to give him the nod that he did say worn out cassette. I too would replace a worn out cassette. But in my experience cassettes and chains don't wear out at the same time. Especially on the lower tier group sets.

I can't see it as foolish to only replace the chain if that is all the is ready for replacement. There might be high mileage cyclists that benefit from changing cassette and chain at the same time. But I think that rare. I've certainly never had to.

And I certainly wouldn't say it's standard practice. If it is, then how many miles a year must you ride to make this worth it?
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