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I keep snapping 105 chains. wth?

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I keep snapping 105 chains. wth?

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Old 02-06-12 | 04:51 PM
  #26  
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Originally Posted by hueyhoolihan
is that one of those old-fashioned chains that permit you to push pins in and out with a clear conscience?
I dont know about that, they sell quicklinks as well. Its just a steel chain that supposed to be one of the most durable chains you can get.
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Old 02-06-12 | 05:08 PM
  #27  
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Yeah, the chain likes to be assembled a certain way. The A/B of that PDF shows it. I'm not assembling it the right way. I've been putting chains together in the B way for a long time.

Next time I buy a chain (soon) I'll read the instructions on the orientation of the assemble link. I never thought a chain would come with instructions that you HAD to read.
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Old 02-06-12 | 05:13 PM
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Originally Posted by Dr. Banzai
I have a Caad9 5 with 105. This chain is brand new. I went for my first post snow ride of the year on Saturday and snapped the chain twice. Once climbing and once on the flat.

It was lubed, in both cases I was not changing gear. I weigh around 200 right now and my legs while not savage, are mostly tree trunks. This is not power related in my books.

Either I have a derailleur issue or the seemingly straight cassette has an issue. I own a quality chain tool that I never leave home with. Chain breakage never strands me.

I bought the bike used and I put a new derailleur/chain on it. This is not the first time the chain has blown up. It took the derailleur with it last time. Should I be looking at the cassette? Looks straight, but we know looks are deceiving.
I'm guessing that you're not installing the HG pins correctly. You are using those when you reassemble the chain, right?
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Old 02-06-12 | 05:18 PM
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Originally Posted by Dr. Banzai
True, I live down on the river on Columbia Street. To go anywhere UP it's 15% grade with cold legs.

I'm thinking switching to a KMC DX10SC might help once I determine the root cause. Just for peace of mind.
You beat me to it.
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Old 02-06-12 | 06:14 PM
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Originally Posted by himespau
do you soak your chains too long in mineral spirits when you go to clean them?
Umm, NO.

You oil your chain, right? You grease bearings, right?

Mineral spirits won't harm the chain at all - at least not if it's true mineral spirits.

Simple Green, on the other hand, has been known to cause hydrogen embrittlement of metals.
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Old 02-06-12 | 06:27 PM
  #31  
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Originally Posted by himespau
do you soak your chains too long in mineral spirits when you go to clean them?
lol - I get your drift.

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Old 02-06-12 | 06:54 PM
  #32  
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Originally Posted by DrPete
I'm guessing that you're not installing the HG pins correctly. You are using those when you reassemble the chain, right?
He said later in the thread that the chain is not breaking on the link he installed the pin on.
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Old 02-06-12 | 07:12 PM
  #33  
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Originally Posted by Dr. Banzai
I have a Caad9 5 with 105. This chain is brand new. I went for my first post snow ride of the year on Saturday and snapped the chain twice. Once climbing and once on the flat.

It was lubed, in both cases I was not changing gear. I weigh around 200 right now and my legs while not savage, are mostly tree trunks. This is not power related in my books.

Either I have a derailleur issue or the seemingly straight cassette has an issue. I own a quality chain tool that I never leave home with. Chain breakage never strands me.

I bought the bike used and I put a new derailleur/chain on it. This is not the first time the chain has blown up. It took the derailleur with it last time. Should I be looking at the cassette? Looks straight, but we know looks are deceiving.
I strongly suspect a misaligned frame here.
Without knowing the history of the frame, it could be a previously crashed frame that was straightened out by hand.
When enough effort is put into a stroke, it easily bends where hit and deforms causing the chain to come out of alignment. Did this happen before the new front derailleur was installed as well?
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