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Old 06-28-07, 11:51 PM   #1
lukeC
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Newbie: Rejoining Chains? extending Chains with/without master Links?

Can someone explain the ins and outs of Chains? breaking / Rejoining / masterlinks / etc..

The other day I had a stuck link on my multi-speed Trek "Hybrid" and the guy at the LBS just removed it and stuck the chain back together.

But then my SS Fixed Gear has a "track" Chain (KMC Kool Chain) on it that came with a "Master Link".

I shortened the chain but now i'm thinking "what if I want to put on a bigger Chainring" do i need to buy a new chain? can I put add some of the links to the KMC back?

ie When can and when can't you just break and rejoin a chain and what do you need to do it.

Do i need special tools - or special rivet things?
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Old 06-29-07, 01:41 AM   #2
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Depends on the chain.

We used to resize chains by pushing a rivet almost all of the way out and replacing it. The problem with doing that is the chain isn't quite as strong when the rivet is pushed back into place.

Shimano chains come with special, replacement pins so you push the old rivet all of the way out and insert the special, replacement pin to rejoin the chain. The problem with that is you have to be sure to get the right size replacement pin for your chain, they are kind of a PITA to use, and you have to use a new pin every time that you break the chain.

Sachs, and some others, use special replacement links to rejoin the chain. They are kind of nice because they make it easy to take off and replace the chain for cleaning.

Lengthening a chain isn't something that you have to do very often. Usually, when I've had to do it, it's been because I had gotten a new cassette. I always replace the chain when I get a new cassette so adding additional links isn't something that I'd do.

In the case of a tight link I use my chain tool to loosen the link and never shorten the chain. A chain that's too short to safely cover the big/big combination is dangerous.
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Old 06-29-07, 07:49 AM   #3
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Also, whatever chain you use, never remove/replace the same pin twice. Pressing it out once enlarges the hole (Shimano's special pins are slightly over-size to compensate). Pressing it out twice can make the hole so large that the pin might drift out, which is extremely dangerous.
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Old 06-29-07, 08:41 AM   #4
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Quote:
Originally Posted by lukeC
Do i need special tools - or special rivet things?
Not for the KMC chain. Specifically which model (not that it would matter). 3/32 or 1/8 ?
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Old 07-03-07, 03:48 PM   #5
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i have a KMC chain with a master link, but push and wrangle as i may, i can't re-open the master link. any tricks for doing so?
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Old 07-03-07, 07:06 PM   #6
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The KMC link snaps into place and won't simple fall apart. I use a chain grabber to let me work on the link with both hands, turn it 90 to the rest of the chain and judiciously apply pliers - one jaw on each side.
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