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PSA Check your older 6700 Chains

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PSA Check your older 6700 Chains

Old 02-10-11, 06:27 PM
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kayakdiver
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PSA Check your older 6700 Chains

Well, I guess it could be worse.... Riding along minding my own business cooling down the other day. Maybe 15 mph at most after just coming up and over a steep little climb. In the 3rd ring and snap crackle pop! Look back and say crap!

Only reason I can come to is the chain broke and caused the rest. Was not anywhere near the 26 ring at the time so pretty much ruling out the RD. Think what happened is that it broke and in the process of going through the RD it took pretty much everything else with it.

So, broken RD hanger, broken chain and trashed cable housing. Wheel out of true but no broken spokes..... Who said riding was cheap

And before the peanut gallery chimes in about the dirty chain... it was clean at the start of the ride... This is not Southern California




So the Giant is getting new parts..... I really don't mind replacing stuff I wear out but this is a bummer.
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Old 02-10-11, 06:42 PM
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jeebus! what did you ride through?
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Old 02-10-11, 06:42 PM
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tough break. what is that, ultegra, DA chain??
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Old 02-10-11, 06:44 PM
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Originally Posted by kayakdiver View Post
Well, I guess it could be worse.... Riding along minding my own business cooling down the other day. Maybe 15 mph at most after just coming up and over a steep little climb. In the 3rd ring and snap crackle pop! Look back and say crap!

Only reason I can come to is the chain broke and caused the rest. Was not anywhere near the 26 ring at the time so pretty much ruling out the RD. Think what happened is that it broke and in the process of going through the RD it took pretty much everything else with it.

So, broken RD hanger, broken chain and trashed cable housing. Wheel out of true but no broken spokes..... Who said riding was cheap

And before the peanut gallery chimes in about the dirty chain... it was clean at the start of the ride... This is not Southern California




So the Giant is getting new parts..... I really don't mind replacing stuff I wear out but this is a bummer.
I just found the problem....
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Old 02-10-11, 06:44 PM
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Originally Posted by AngryScientist View Post
tough break. what is that, ultegra, DA chain??
Both Ultegra...
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Old 02-10-11, 06:45 PM
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Originally Posted by darb85 View Post
jeebus! what did you ride through?
The Northwest in Feb...
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Old 02-10-11, 06:49 PM
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Yeah, breaking chains sucks. I've only ever done it once, on my single speed mountain bike. I don't know what spurred the break, but the snap sent me over the bars and cracked my helmet.

And yeah, riding through Washington in the winter is a pretty dirty process. Just ask my brother's campus bike.
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Old 02-10-11, 07:34 PM
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Last chain I broke, sent me over the bars, a fun ride in the ambulance, a week in hospital, collar bone, head injury, 3 ribs and cracked scapula. I'd trade that for a broken RD.
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Old 02-10-11, 07:41 PM
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Originally Posted by sideshow_bob View Post
Last chain I broke, sent me over the bars, a fun ride in the ambulance, a week in hospital, collar bone, head injury, 3 ribs and cracked scapula. I'd trade that for a broken RD.
That sucks.... and yes I realize it could have been much worse. Rear wheel locked up but was riding up a slight grade just cooling down so.. flat spot on the tire and no crash. I hate broken body parts!
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Old 02-10-11, 08:10 PM
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This is why God invented the replaceable derailleur hanger.
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Old 02-10-11, 08:28 PM
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That's exactly what killed my beloved Scott CR1 Sl. I was standing and sprinting, everything broke up, rear wheel locked up, and I kept it upright, skidding to a stop. Mine was a DA chain.
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Old 02-10-11, 08:55 PM
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Originally Posted by Quel View Post
This is why God invented the replaceable derailleur hanger.
No, it was evolution
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Old 02-10-11, 09:06 PM
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Originally Posted by Homebrew01 View Post
No, it was evolution
Well played
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Old 02-11-11, 12:14 AM
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I thought it was intelligent design.

Oh well...

What happened to that concept, by the way?
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Old 02-11-11, 12:19 AM
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Originally Posted by Rowan View Post
I thought it was intelligent design.

Oh well...

What happened to that concept, by the way?
Lacked the part in bold
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Old 02-11-11, 12:42 AM
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Was it an old chain (not old as in worn, but had you bought it and stashed it for a while?). There were some earlier issues with seemingly bad batches of 6700 chains. https://cozybeehive.blogspot.com/2010...n-failure.html
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Old 02-11-11, 03:09 AM
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I snapped my first chain ever (in 25+ years of riding) a few weeks ago. It also bent my derailleur beyond what could be repaired.
So, about $100 later, I'm back in business. No injuries, thank goodness. I've had enough of those over the past 9 months!
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Old 02-11-11, 05:38 AM
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Originally Posted by BeeSeeBee View Post
Was it an old chain (not old as in worn, but had you bought it and stashed it for a while?). There were some earlier issues with seemingly bad batches of 6700 chains. https://cozybeehive.blogspot.com/2010...n-failure.html
Thanks for the link. Now I have to go clean my chain, and check for cracks.
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Old 02-11-11, 08:26 AM
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Check out the new Crud Catcher fenders. They added a section to the rear fender help keep crud off the FD and chain. I got sets for my and my wife's backup bikes for riding in all the sand and salt on the roads.

https://www.crudproducts.com/products/roadracer/image
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Old 02-11-11, 09:34 AM
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Originally Posted by BeeSeeBee View Post
Was it an old chain (not old as in worn, but had you bought it and stashed it for a while?). There were some earlier issues with seemingly bad batches of 6700 chains. https://cozybeehive.blogspot.com/2010...n-failure.html
It was the original Ultegra chain that came with the bike purchased in October. So maybe this was one of the bad ones. I'm going to get an RA number and ship both chain and RD to Shimano and see what happens.... figure nothing, but you never know.
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Old 02-11-11, 09:38 AM
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Originally Posted by BeeSeeBee View Post
Was it an old chain (not old as in worn, but had you bought it and stashed it for a while?). There were some earlier issues with seemingly bad batches of 6700 chains. https://cozybeehive.blogspot.com/2010...n-failure.html
That picture in that blog looks exactly like mine.... hmm... Going to look a little harder for more cracks tonight. Thanks for the link!
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Old 02-11-11, 11:36 AM
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So I checked out my chain, and what do I find? Thanks again to BeeSeeBee for the link above. I now have a 5600 chain on, and this 6700 chain will go to the trash can.

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Old 02-11-11, 11:46 AM
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Originally Posted by Namenda View Post
So I checked out my chain, and what do I find? Thanks again to BeeSeeBee for the link above. I now have a 5600 chain on, and this 6700 chain will go to the trash can.

Yikes.... I have to say it's not something I ever look for... I will in the future!
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Old 02-11-11, 11:59 AM
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Originally Posted by kayakdiver View Post
Yikes.... I have to say it's not something I ever look for... I will in the future!
If not for this thread, I would never have checked. So, many thanks to you!
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Old 02-11-11, 12:07 PM
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Yikes!
The only other time I've heard of a chain failing that way was some years ago when a friend found cracks like that on a nearly-new Wippermann stainless chain.
Fortunately, he found them before it failed.

Think I'll stick to SRAM and KMC, especially since they include the master links.
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