Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Broken 105 Chain

Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Broken 105 Chain

Old 04-11-21, 10:36 PM
  #1  
SoSmellyAir
Method to My Madness
Thread Starter
 
Join Date: Nov 2020
Location: Orange County, California
Posts: 796

Bikes: Cannondale Synapse, Trek FX 2

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 364 Post(s)
Liked 208 Times in 165 Posts
Broken 105 Chain

During a ride yesterday afternoon, I sprinted a little bit on a flat road, heard a "prang" sound, and felt my chain slip over the rear cog every few revolutions when I pedaled hard. I knew my chain was not worn because I had just cleaned it, measured it with a Pedro chain checker (Chain Checker Plus II » Pedro's NA), and lubed it the day before yesterday. When I got home, I discovered a broken link in my chain. I am quite sure that there are < 2,000 miles on this chain so I don't know how this could have happened. And no, I am not powerful. Luckily, I have an Ultegra chain bought during Thanksgiving sale, so that went on today.


Last edited by SoSmellyAir; 04-11-21 at 10:42 PM.
SoSmellyAir is offline  
Old 04-12-21, 05:26 AM
  #2  
Sy Reene
Advocatus Diaboli
 
Sy Reene's Avatar
 
Join Date: Feb 2015
Location: Wherever I am
Posts: 7,335

Bikes: Merlin Cyrene, Nashbar steel CX

Mentioned: 11 Post(s)
Tagged: 1 Thread(s)
Quoted: 3917 Post(s)
Liked 963 Times in 644 Posts
Did you consider just fixing with a quicklink? Also, supposedly the 105 (601) chain is directional. I'm not sure exactly how one tells if the chain is installed in the right direction, but here's a snip of a 105 chain -- I don't see any of the same markings on your chain.

Sy Reene is offline  
Old 04-12-21, 05:58 AM
  #3  
Mojo31
...
 
Join Date: Jul 2020
Posts: 3,137
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2509 Post(s)
Liked 1,426 Times in 794 Posts
Markings go on the outside.
Mojo31 is offline  
Likes For Mojo31:
Old 04-12-21, 06:02 AM
  #4  
eduskator
Senior Member
 
eduskator's Avatar
 
Join Date: Aug 2019
Location: Québec, Canada
Posts: 1,036

Bikes: TCR Pro 0 / Revolt 2

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 452 Post(s)
Liked 264 Times in 199 Posts
2000 miles is not that much if it was maintained properly throughout its life. If it was mine, I would get a new link and keep it if it's still good (under 0.5% of stretch).

A chain is as strong as its weakest link, as they say

On a similar note, do you always keep your chain as dirty as that? Looking from the picture, there is way too much lube on it. It will only attract dirt that will end up inside the rollers and reduce its lifespan.

Last edited by eduskator; 04-12-21 at 06:05 AM.
eduskator is offline  
Old 04-12-21, 07:14 AM
  #5  
walnutz
Senior Member
 
walnutz's Avatar
 
Join Date: Jun 2010
Location: ATX
Posts: 606

Bikes: CO-OP ADV 3.1 aka Beeftank, All-City Super Professional aka Bulldozer

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
Liked 123 Times in 64 Posts
Originally Posted by eduskator View Post
2000 miles is not that much if it was maintained properly throughout its life. If it was mine, I would get a new link and keep it if it's still good (under 0.5% of stretch).

A chain is as strong as its weakest link, as they say

On a similar note, do you always keep your chain as dirty as that? Looking from the picture, there is way too much lube on it. It will only attract dirt that will end up inside the rollers and reduce its lifespan.
If that’s an extremely dirty chain, I’m in trouble 😮. As for OP, that is a really bizarre failure, glad it didn’t cause any major issues.
walnutz is offline  
Likes For walnutz:
Old 04-12-21, 08:14 AM
  #6  
Sy Reene
Advocatus Diaboli
 
Sy Reene's Avatar
 
Join Date: Feb 2015
Location: Wherever I am
Posts: 7,335

Bikes: Merlin Cyrene, Nashbar steel CX

Mentioned: 11 Post(s)
Tagged: 1 Thread(s)
Quoted: 3917 Post(s)
Liked 963 Times in 644 Posts
Originally Posted by Mojo31 View Post
Markings go on the outside.
Ok.. but which way is up? just curious
Sy Reene is offline  
Old 04-12-21, 08:40 AM
  #7  
Mojo31
...
 
Join Date: Jul 2020
Posts: 3,137
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2509 Post(s)
Liked 1,426 Times in 794 Posts
Originally Posted by Sy Reene View Post
Ok.. but which way is up? just curious
Letters are right side up on the top and upside down on the bottom. Duh....
Mojo31 is offline  
Old 04-12-21, 08:47 AM
  #8  
Iride01
Hits [ENTER] b4 thinking
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 8,250

Bikes: '20 Tarmac Disc Comp '91, '78 Raleigh Competition GS

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 3250 Post(s)
Liked 1,842 Times in 1,308 Posts
So you are just bragging that you broke the chain........... SH!
Iride01 is offline  
Old 04-12-21, 08:52 AM
  #9  
Iride01
Hits [ENTER] b4 thinking
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 8,250

Bikes: '20 Tarmac Disc Comp '91, '78 Raleigh Competition GS

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 3250 Post(s)
Liked 1,842 Times in 1,308 Posts
Originally Posted by Mojo31 View Post
Letters are right side up on the top and upside down on the bottom. Duh....
No, the plates on most don't care whether they are up or down. Just which side they are on. I've got both upside down and right-side up SHIMANO on the outside plates of my chains.
Iride01 is offline  
Old 04-12-21, 09:02 AM
  #10  
Moe Zhoost
Half way there
 
Moe Zhoost's Avatar
 
Join Date: Sep 2015
Location: Durham, NC
Posts: 2,494

Bikes: Many, and the list changes frequently

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 812 Post(s)
Liked 597 Times in 355 Posts
Originally Posted by eduskator View Post
On a similar note, do you always keep your chain as dirty as that? Looking from the picture, there is way too much lube on it. It will only attract dirt that will end up inside the rollers and reduce its lifespan.
You think that chain is dirty? You must be one of those waxers. Thankfully I was able to break that habit a decade ago.
Moe Zhoost is offline  
Likes For Moe Zhoost:
Old 04-12-21, 09:06 AM
  #11  
Mojo31
...
 
Join Date: Jul 2020
Posts: 3,137
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2509 Post(s)
Liked 1,426 Times in 794 Posts
Originally Posted by Iride01 View Post
No, the plates on most don't care whether they are up or down. Just which side they are on. I've got both upside down and right-side up SHIMANO on the outside plates of my chains.
I know, perhaps I should have used the sarcasm emoji.

Of course, the plates will be both upside down and right side up no matter how you install it. Just depends on the part of the chain you look at.
Mojo31 is offline  
Old 04-12-21, 09:12 AM
  #12  
Sy Reene
Advocatus Diaboli
 
Sy Reene's Avatar
 
Join Date: Feb 2015
Location: Wherever I am
Posts: 7,335

Bikes: Merlin Cyrene, Nashbar steel CX

Mentioned: 11 Post(s)
Tagged: 1 Thread(s)
Quoted: 3917 Post(s)
Liked 963 Times in 644 Posts
Originally Posted by Mojo31 View Post
Letters are right side up on the top and upside down on the bottom. Duh....
hmm. which letters? See the photo I posted?
Sy Reene is offline  
Old 04-12-21, 09:13 AM
  #13  
Sy Reene
Advocatus Diaboli
 
Sy Reene's Avatar
 
Join Date: Feb 2015
Location: Wherever I am
Posts: 7,335

Bikes: Merlin Cyrene, Nashbar steel CX

Mentioned: 11 Post(s)
Tagged: 1 Thread(s)
Quoted: 3917 Post(s)
Liked 963 Times in 644 Posts
Originally Posted by Iride01 View Post
No, the plates on most don't care whether they are up or down. Just which side they are on. I've got both upside down and right-side up SHIMANO on the outside plates of my chains.
So, by "directional chain", the direction is just that letters are outside, not actually which direction the chain runs in?
Sy Reene is offline  
Old 04-12-21, 09:14 AM
  #14  
Mojo31
...
 
Join Date: Jul 2020
Posts: 3,137
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2509 Post(s)
Liked 1,426 Times in 794 Posts
Originally Posted by Sy Reene View Post
hmm. which letters? See the photo I posted?
See post 11.
Mojo31 is offline  
Old 04-12-21, 09:15 AM
  #15  
Mojo31
...
 
Join Date: Jul 2020
Posts: 3,137
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2509 Post(s)
Liked 1,426 Times in 794 Posts
Originally Posted by Sy Reene View Post
So, by "directional chain", the direction is just that letters are outside, not actually which direction the chain runs in?
Yes.
Mojo31 is offline  
Old 04-12-21, 09:16 AM
  #16  
Iride01
Hits [ENTER] b4 thinking
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 8,250

Bikes: '20 Tarmac Disc Comp '91, '78 Raleigh Competition GS

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 3250 Post(s)
Liked 1,842 Times in 1,308 Posts
Originally Posted by Mojo31 View Post
I know, perhaps I should have used the sarcasm emoji.

Of course, the plates will be both upside down and right side up no matter how you install it. Just depends on the part of the chain you look at.
Oh....

You'd think they would put them on all the same way. If my wife was to ever notice that, it'd drive her nuts. She's a little particular about how things are arranged. If I turn one of the Kurig pods upside down in her pod holder, she gets bothered. <grin> LOL I don't use Kurig pods. Those pods have to be filling up landfills quicker than plastic bottles now. I just brew my coffee in the morning and let it sit in a pot till gone.
Iride01 is offline  
Old 04-12-21, 09:41 AM
  #17  
79pmooney
A Roadie Forever
 
79pmooney's Avatar
 
Join Date: Oct 2014
Location: Portland, OR
Posts: 9,665

Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder

Mentioned: 103 Post(s)
Tagged: 0 Thread(s)
Quoted: 2989 Post(s)
Liked 1,583 Times in 1,050 Posts
Originally Posted by walnutz View Post
If that’s an extremely dirty chain, I’m in trouble 😮. As for OP, that is a really bizarre failure, glad it didn’t cause any major issues.
+1 My chains are only occasionally that clean. (Perhaps the requirement for clean is higher with higher than 9-speed. I wouldn't know.)

I see chain cleanliness as a balancing act between looks, chain life, land fill and solvent use, my time and my pocketbook. My chains being fairly cheap, doing a lot of work for a few extra miles doesn't seem worthwhile and I have no OCD requiring my chains to be spotless. That might change when I go 11-speed.
79pmooney is offline  
Likes For 79pmooney:
Old 04-12-21, 09:49 AM
  #18  
Sy Reene
Advocatus Diaboli
 
Sy Reene's Avatar
 
Join Date: Feb 2015
Location: Wherever I am
Posts: 7,335

Bikes: Merlin Cyrene, Nashbar steel CX

Mentioned: 11 Post(s)
Tagged: 1 Thread(s)
Quoted: 3917 Post(s)
Liked 963 Times in 644 Posts
Originally Posted by Mojo31 View Post
Yes.
Got it.
Back to the OP.. Is this a 105 chain in the first place? I don't recognize the markings, but perhaps there's OEM versions that differ from retail packaged chains?

looking closely, his chain appears to have an NE engraved in the side plates.

Sy Reene is offline  
Old 04-12-21, 09:50 AM
  #19  
79pmooney
A Roadie Forever
 
79pmooney's Avatar
 
Join Date: Oct 2014
Location: Portland, OR
Posts: 9,665

Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder

Mentioned: 103 Post(s)
Tagged: 0 Thread(s)
Quoted: 2989 Post(s)
Liked 1,583 Times in 1,050 Posts
Originally Posted by SoSmellyAir View Post

[/QUOTE]
I see why the lettering must be on the outside. Notice the very tidy recess for the pin head on the outside and the simple exposed peened pin on the inside? These chains have vanity issues. Showing off what is never intended to be seen doing something as public as a sprint? He/she couldn't take it. (If the chain was inanimate, it wouldn't care.)
79pmooney is offline  
Old 04-12-21, 10:02 AM
  #20  
Iride01
Hits [ENTER] b4 thinking
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 8,250

Bikes: '20 Tarmac Disc Comp '91, '78 Raleigh Competition GS

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 3250 Post(s)
Liked 1,842 Times in 1,308 Posts
Originally Posted by Sy Reene View Post
So, by "directional chain", the direction is just that letters are outside, not actually which direction the chain runs in?
I don't know that Shimano makes any chains that are worried about their direction of rotation. Shimano for a long time has cared that their name is on the outside. Whether that is for advertising or that the side plates are different for the dynamics of upshifting vs downshifting I don't know. I'm happy to oblige them either way.
Iride01 is offline  
Old 04-12-21, 10:11 AM
  #21  
msu2001la
Senior Member
 
msu2001la's Avatar
 
Join Date: Mar 2006
Location: Midwest
Posts: 1,472
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 616 Post(s)
Liked 519 Times in 314 Posts
Originally Posted by Iride01 View Post
I don't know that Shimano makes any chains that are worried about their direction of rotation. Shimano for a long time has cared that their name is on the outside. Whether that is for advertising or that the side plates are different for the dynamics of upshifting vs downshifting I don't know. I'm happy to oblige them either way.
The side plates are slightly different on the outside vs inside. If you look carefully at the edges of the plates, they have a slight chamfer around the outside perimeter.

I think this is to improve front chainring shift performance. I have no idea why they don't just make both sides like this, but the difference is highlighted in the manual (yes, there is a manual on chains):
Shimano Chains


Last edited by msu2001la; 04-12-21 at 10:14 AM.
msu2001la is offline  
Likes For msu2001la:
Old 04-12-21, 10:33 AM
  #22  
eduskator
Senior Member
 
eduskator's Avatar
 
Join Date: Aug 2019
Location: Québec, Canada
Posts: 1,036

Bikes: TCR Pro 0 / Revolt 2

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 452 Post(s)
Liked 264 Times in 199 Posts
Originally Posted by Moe Zhoost View Post
You think that chain is dirty? You must be one of those waxers. Thankfully I was able to break that habit a decade ago.
I am not, even if it's the best lubricant out there. My chain, chainrings and cassette are always 100% clean though. All you need to do is wipe it off after every ride. Literally takes 15 seconds.
eduskator is offline  
Likes For eduskator:
Old 04-12-21, 10:40 AM
  #23  
Psimet2001 
I eat carbide.
 
Psimet2001's Avatar
 
Join Date: Jan 2006
Location: Elgin, IL
Posts: 21,386

Bikes: Lots. Van Dessel and Squid Dealer

Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 1164 Post(s)
Liked 927 Times in 411 Posts
Originally Posted by msu2001la View Post
The side plates are slightly different on the outside vs inside. If you look carefully at the edges of the plates, they have a slight chamfer around the outside perimeter.

I think this is to improve front chainring shift performance. I have no idea why they don't just make both sides like this, but the difference is highlighted in the manual (yes, there is a manual on chains):
Shimano Chains

They make them like that because of all of the ramps and features they have worked into the cogs and the chainrings to help with shifting. One set of plates is designed to work better climbing up the cogs. The other side plates are better at climbing the chainrings.

As for it making a difference - It has absolutely made a difference on more than one bike I have worked on where the owner put a new chain on "backwards" then rode it for a couple of hundred miles and brought it in because it shifted horribly.

OP - as for the plate cracking - that's not exactly completely unheard of. It could just be a one off issue. Inspect the other links for cracks that radiate out from the pin. If you cleaning techniques uses cleaners that can cause hydrogen embrittlement then this can happen more easily. There was a bit of a hubbabaloo about using simple green to clean chains many years back and how it's use, possibly in a ultrasonic cleaner or heated wash could accelerate conditions for hydrogen embrittlement to occur.
__________________
PSIMET Wheels, PSIMET Racing, PSIMET Neutral Race Support, and 11 Jackson Coffee
Podcast - YouTube Channel
Video about PSIMET Wheels

Psimet2001 is offline  
Likes For Psimet2001:
Old 04-12-21, 10:41 AM
  #24  
Psimet2001 
I eat carbide.
 
Psimet2001's Avatar
 
Join Date: Jan 2006
Location: Elgin, IL
Posts: 21,386

Bikes: Lots. Van Dessel and Squid Dealer

Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 1164 Post(s)
Liked 927 Times in 411 Posts
Originally Posted by eduskator View Post
I am not, even if it's the best lubricant out there. My chain, chainrings and cassette are always 100% clean though. All you need to do is wipe it off after every ride. Literally takes 15 seconds.
If the general state of bikes that come to me for service are any indicator you are truly wizzing into the wind on this one. Honestly I'd settle for people just washing their bike once every 50 rides or so. Not many do.
__________________
PSIMET Wheels, PSIMET Racing, PSIMET Neutral Race Support, and 11 Jackson Coffee
Podcast - YouTube Channel
Video about PSIMET Wheels

Psimet2001 is offline  
Old 04-12-21, 10:44 AM
  #25  
SoSmellyAir
Method to My Madness
Thread Starter
 
Join Date: Nov 2020
Location: Orange County, California
Posts: 796

Bikes: Cannondale Synapse, Trek FX 2

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 364 Post(s)
Liked 208 Times in 165 Posts
Originally Posted by eduskator View Post
2000 miles is not that much if it was maintained properly throughout its life. If it was mine, I would get a new link and keep it if it's still good (under 0.5% of stretch).
The OEM chain was not maintained properly throughout the first half of its mileage. Even though my bike is 4 years old, I did not really care or learn about maintenance until about a year and a half ago. So since I had a replacement chain, I figured I might as well use it, to minimize the chances of the same thing happening.

Originally Posted by eduskator View Post
On a similar note, do you always keep your chain as dirty as that? Looking from the picture, there is way too much lube on it. It will only attract dirt that will end up inside the rollers and reduce its lifespan.
The photo was taken after a 20 mile ride after a chain cleaning and lubrication. I was doing the post ride wipe, which I generally only do after the first ride after a chain cleaning and lubrication, when I discovered the broken link. Thank you to walnutz, 79pmooney, and Moe Zhoost for affirming the adequacy of my chain cleanliness.

Last edited by SoSmellyAir; 04-12-21 at 11:00 AM.
SoSmellyAir is offline  
Likes For SoSmellyAir:

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.