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Pin slipped partway out of chain link -- safe to just push back in?

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Pin slipped partway out of chain link -- safe to just push back in?

Old 06-20-21, 09:46 PM
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JBwombat
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Pin slipped partway out of chain link -- safe to just push back in?

Hi, my wife had a new chain put on at our LBS a couple months ago. It jammed up today and when I looked at it, a pin was protruding out of one link. I pushed it back in, but I'm wondering if it's safe or should we assume if it came out once it'll happen again and we replace the chain? Thanks!
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Old 06-20-21, 09:54 PM
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cxwrench
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Best thing to do is replace it. Or more correctly, take it back to the shop and show it to them...maybe they'll replace it.

ETA: This happened a couple of months after it was installed. No problems until then? If not then it's probably operator error on the part of your wife. Probably.

Last edited by cxwrench; 06-21-21 at 09:46 AM.
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Old 06-20-21, 11:10 PM
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thanks for the advice!
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Old 06-21-21, 04:06 AM
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Amt0571
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Originally Posted by JBwombat View Post
Hi, my wife had a new chain put on at our LBS a couple months ago. It jammed up today and when I looked at it, a pin was protruding out of one link. I pushed it back in, but I'm wondering if it's safe or should we assume if it came out once it'll happen again and we replace the chain? Thanks!
I once did this. Held up for 2500km and it happened again.Pushed it in and it lasted 200km.

Replace it with a quick link or replace the chain if it's moderately worn. You don't want it to snap when sprinting.
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Old 06-21-21, 07:41 AM
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It really depends on the chain width. If it's a 7-speed on lower chain, pushing a pin back in is probably ok. If it's 8-speed or above it's likely to cause a problem in the future. As noted, take it back to the bike shop that did the original installation.
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Old 06-21-21, 08:46 AM
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Iride01
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If a shop did it, they need to see what they did.

Otherwise, yes you can push it back in. Will it stay in? I don't know. If it comes out again you can do something else. Not likely to be the end of the world, unless you are the code keeper and have to get somewhere quickly to prevent doomsday. <grin>

A quick link might be a good fix, but then you have to know how to remove the other pin.
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Old 06-21-21, 09:17 AM
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I'd say if the pin was already coming out on it's own it probably will not stay in place if pushed back in no matter what speed your chain is. As mentioned take it to the shop first or replace the bad link with a quick link.
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Old 06-21-21, 09:43 AM
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Chain pin

Some chains utilize a "one time use" pin.
You push out a pin to size the chain, but upon rejoining the ends you a meant to use the supplied "one time Use" pin.
Shimano chains come to mind, although my most recent Shimano chains were supplied with a "one time use" quick link.

As your pin worked it's way out to the point it jammed, I'd suspect it would have stressed the one side plate it was still connected to.
I'd expect the same pin to back out again if you simply pushed it back.
Replacing the potentially damaged side plate with a correctly sized quick link might be the more convenient long term fix.

Barry

BTW - Welcome to Bike Forums!
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Old 06-22-21, 10:29 AM
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Thanks Barry and everyone else who replied above! My wife took it out for an errand requiring a couple mile ride and it worked loose again, replacing it pronto!
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