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Are quick links REALLY single use?

Old 08-22-22, 02:25 PM
  #26  
zandoval 
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Not any more...


I have reused Quick Links for many years without problems. My chains are SRAM 6-8 and KMC 8 speeds. But just last year I have had two disintegrate. One at removal, and the other at application. I really have no idea how many times I had reapplied them or of thier manufacture.

I bought some ChiCom knock off links and some brand name brand links and sure enough, even under close comparison with calipers and destructive pliers, I could not elicit a difference. So now I am just replacing them about every third application or sooner.

I buy them eight pair at a time. Inspect and clean them, then spray them with white paint. It's no biggy...

Note that if you have, and are proficient, with a quality chain breaker, then you don't need Quick Links.
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Last edited by zandoval; 08-23-22 at 03:31 PM.
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Old 08-22-22, 03:01 PM
  #27  
BCDrums
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Originally Posted by _ForceD_ View Post
Yes, I used quicks occasionally back then. And I use them occasionally now. But I don’t see much difference (“improvement”) in the ones from yesteryear, and the ones of today. So I ask again…what has changed?
Dan, in your first post you alleged that quicklinks were "substandard" without citing why. They weren't then, they aren't now, there's no need to show an "improvement."

What changes have improved the individual quick link? Quality of the metal used? Closer machining tolerances? Ease of use (although that doesn’t seem to have changed)?
Well yes it has. The Wippermann Connex link makes connecting and disconnecting the chain easy, as seen in this :35 video
Might you weep with joy? Probably not.

Or have attitudes about their use changed?
I suppose, Yes, because they work so well. And now I will remove myself from your lawn.

Last edited by BCDrums; 08-22-22 at 03:08 PM.
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Old 08-22-22, 03:14 PM
  #28  
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Originally Posted by BCDrums View Post
Dan, in your first post you alleged that quicklinks were "substandard" without citing why. They weren't then, they aren't now, there's no need to show an "improvement."

Sorry. Clarification — Them being substandard isn’t necessarily how I felt about them, but rather the general attitude toward their quality, and using them.

Dan
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Old 08-23-22, 06:03 AM
  #29  
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KMC indicates reusability in the part number of their quick links (Missing Links, to use KMC's trade name): https://www.kmcchain.com/en/teach/missinglink

Even for the reusable ones, they recommend replacing it after 3-5 "uses" (which I presume to mean couple-decouple events). I personally use them until they clearly have worn to the point where they're very easy to decouple...and even then...they go into a small baggie in my spares case that I carry with me for emergency use on the road or trail.
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Old 08-23-22, 08:28 AM
  #30  
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I initially struggled to feel confident with the links but have come to trust them given that:

1) I use a tool that allows me to replace them without damaging them.

2) I take considerable care in replacing the links.

3) As mentioned above, I always note whether or not the links effectively click into place. So far, they always do.

4) I don't do much cross chaining.

As a structural engineer, I can't help wondering about possible failure modes with the links. I've seen none but my intuition leads me to suspect that it would be one of the following:

5) If the mechanism that clicks the links into place were worn, perhaps the links would come undone under a slack chain or during cross chaining.

6) If the replacement was done as a clumsy affair, perhaps the links would get bent in an unfavorable way. Were this to come to pass, I would expect to hear a pretty noisy chain.

It's tempting to speculate that the pins might shear off from repeated link installation but, given the stresses that those same pins deal with successfully in service, this seems unlikely to me.
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Old 08-23-22, 09:15 AM
  #31  
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Originally Posted by Harold74 View Post
As a structural engineer, I can't help wondering about possible failure modes with the links. I've seen none but my intuition leads me to suspect that it would be one of the following:
5) If the mechanism that clicks the links into place were worn, perhaps the links would come undone under a slack chain or during cross chaining.
6) If the replacement was done as a clumsy affair, perhaps the links would get bent in an unfavorable way. Were this to come to pass, I would expect to hear a pretty noisy chain.
It's tempting to speculate that the pins might shear off from repeated link installation but, given the stresses that those same pins deal with successfully in service, this seems unlikely to me.
All good points but in practice these have not been a concern, well except clumsy installation, which is what I've seen as the biggest source of failure. #5 could be a concern but usually we're talking about well over 30 remove/replace before that's an issue. Pins shearing off at the groove is something I have never heard mentioned anywhere in the 30 yrs or so that the QL's have been on the market. Cross chaining has also not been an issue as many tourers using triples and having a total weight of over 300 lbs (bike/rider/gear) have not had any more failures than traditional master links. Lots of cheap generic QL's on Ebay, Amazon, etc., but I would stick with the main brands for known quality.
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Old 08-26-22, 10:21 PM
  #32  
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Search is a wonderful thing. I don't mean to but am probably a jerk for pointing this out, but this quiestion has been asked several times per year since it first became a question in the era of 10 speed chains. No new information has been added since, and it's easy to explore.

Bike Forums - Search Results
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Old 08-27-22, 03:17 AM
  #33  
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Originally Posted by rbrides View Post
Quick links are described as “use only once” in the user/installation documentation.

is that just super cautious input from the manufacturer or truly a smart practice?

I have reused them before but, hey, maybe I was tempting fate.
Great question. I have often wondered that myself. Glad to see some input from the hivemind on this subject.
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Old 08-27-22, 08:03 AM
  #34  
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Wippermann Connex links don't "click" together -- a curved slot and chain tension keep them from coming apart. It was surprising to me how they were designed! They worked great on my 10 speed Campagnolo chains.

The 11 speed Shimano Connex versions were extremely expensive back in 2014, so I switched to Sram links, and disassembled them and reinstalled with no problems.

Now chains come with quick links instead of a pin. That's way better for us amateur mechanics. No technical pin install or expensive peening chain tools needed.
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Old 08-29-22, 10:56 PM
  #35  
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Why does anyone think that the pressed in Shimano method was better than a quick link? Much, much greater chance of doing it improperly, imho.
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Old 08-30-22, 06:59 AM
  #36  
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Many chains have no other option and I believe that's true with all 12 speed chains. I just bought some reusable YBN 12 speed links that should work with any 12 speed chain. I'm on SRAM 12 speed and reuse their links for the life of a chain.
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