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  1. #1
    Dirt Bomb sknhgy's Avatar
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    Decal says "Use Shimano IG chain only"

    Is this some special kind of chain? It's on a Montague 1996 Olympics bike. Here's a pic. If I break the chain will it be difficult to find a replacement link/master link?
    The bb is loose and it's making popping noises. I'm going to try and fix it. Referring to my other post I will be buying a tool to pull the crank off with.
    Can anyone offer any other information as to what I will encounter when removing this bb?
    I removed the left side crank with a gear puller, but won't be able to use that on the right side for fear of distorting a chainring. I'll need a special tool.
    After I get the cranks off then I'll see what it takes to remove the bb. It would be nice to only have to make one tool order.
    This is a learning experience for me.
    Any help would be appreciated.
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    Last edited by sknhgy; 11-10-10 at 05:27 PM.

  2. #2
    Senior Member Shimagnolo's Avatar
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  3. #3
    Dirt Bomb sknhgy's Avatar
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    Quote Originally Posted by Shimagnolo View Post
    "Shimano says you shouldn't use H.G. chains on I.G. cassettes. SRAM chains are compatible with both types. "

    Hey, thanks Shimagnolo. According to the above quote from Brown, I can replace the I.G. chain with a SRAM chain, if need be. That's helpful to know.
    Now I if I can just get that right side crank off without wrecking anything I'll be able to see what's in that bb shell.................................

  4. #4
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    Any current chain of the right width, ie. 8s, 9s, etc will work. feel free to use the chain of your choice from Shimano, Sram, KMC, Wippermann, Taya, or others. It might have been an issue back in 1996, but chain and cassette progress is evolutionary and there's little risk of finding a non IG compatible chain these days unless you try.
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  5. #5
    Senior Member kamtsa's Avatar
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    Quote Originally Posted by FBinNY View Post
    Any current chain It might have been an issue back in 1996, but chain and cassette progress is evolutionary and there's little risk of finding a non IG compatible chain these days unless you try.
    What was the difference between IG and non IG chains?

  6. #6
    Senior Member Monster Pete's Avatar
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    Quote Originally Posted by sknhgy View Post
    If I break the chain will it be difficult to find a replacement link/master link?
    Just rejoin the broken link with the chain tool, unless you specifically want a master link?

  7. #7
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    Quote Originally Posted by kamtsa View Post
    What was the difference between IG and non IG chains?
    With the advent of Hyperglide and similar gated shifting, side stresses on chains increased markedly. Chains evolved from traditional designs where plates were simply pressed on pins and held by their tight fit, to having pins that were peened over the plates sort of like the riveting that hold structural steel assemblies together. The peening helps prevent chain breakage by preventing the plates from being spread beyond the end of the plates.

    Quote Originally Posted by Monster Pete View Post
    Just rejoin the broken link with the chain tool, unless you specifically want a master link?
    Bad advice. You cannot simply cut and splice current production (last 10+ years) derailleur chains with a chain tool. They can be cut the same as always, but connecting requires either a special pin or connecting link. Simply re-splicing by pressing the pin out and back with a chain tool doesn't provide enough side strength for use with gated shift systems, and greatly increases the odds of chain breakage.
    Last edited by FBinNY; 11-11-10 at 08:01 AM.
    FB
    Chain-L site

    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  8. #8
    Senior Member Monster Pete's Avatar
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    Quote Originally Posted by FBinNY View Post
    You cannot simply cut and splice current production (last 10+ years) derailleur chains with a chain tool.
    Oh I see- only had experience with the older type. How do you go about removing the cut link then? Surely doing so makes in effect another break in the chain, resulting in another link to be removed?

  9. #9
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    Quote Originally Posted by kamtsa View Post
    What was the difference between IG and non IG chains?
    FBinNY's reply about ther revised pin designs needed for chains used with gated and enhanced cogs and chainrings is correct but both HG and IG chains required the special joining pin in 8-speed and newer types.

    Shimano recommended the HG chains for road cassettes and IG for MTB cassettes as their sideplate designs were somewhat different. They also said IG chains were satisfactory for use with road cassettes and my own experience bears this out. I used IG90 chains for tens of thousands of miles on various 7 and 8-speed road bikes and they worked very well. They were also available at very attractive prices (often under $15) and were very durable.

  10. #10
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    Quote Originally Posted by Monster Pete View Post
    Oh I see- only had experience with the older type. How do you go about removing the cut link then? Surely doing so makes in effect another break in the chain, resulting in another link to be removed?
    How you cut depends on how you plan to close the chain.

    If using a link, you'll remove an outer link by cutting both sides, leaving an inner link at both ends. If using the special connecting pin made for your chain, you drive the old pin out completely and replace it.
    FB
    Chain-L site

    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  11. #11
    Senior Member Iowegian's Avatar
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    Quote Originally Posted by sknhgy View Post
    Now I if I can just get that right side crank off without wrecking anything I'll be able to see what's in that bb shell.................................
    Try this: http://www.parktool.com/blog/repair-help

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