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  1. #1
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    7,8 or 9 speed chains....help me please!

    I am in the market for a new chain for my road bike. The current setup is 8-speed sora with an HG50 shimano chain. I was looking at getting a new one and got confused when I came across the variations - HG50, HG70, HG90, HG53, HG73, HG93 and then IG50, IG70 and IG90.

    Can anyone tell me about compatibilities and what all these models are for? - I always thought 8 and 9 speed use the same width then 7 is a bit fatter and 10 is thinner???

  2. #2
    Nut infinityeye's Avatar
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    get the sram pc-48 or pc-58

  3. #3
    Unique Vintage Steel cuda2k's Avatar
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    Quote Originally Posted by infinityeye
    get the sram pc-48 or pc-58
    +1 I use the PC-58 and quite happy (except that the PowerLink is a *major pain in the behind* to undo)

  4. #4
    Mad bike riding scientist cyccommute's Avatar
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    Quote Originally Posted by cuda2k
    +1 I use the PC-58 and quite happy (except that the PowerLink is a *major pain in the behind* to undo)
    Here is a method that works to take them apart. The key is pinching the plates together.
    Stuart Black
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    Days of Wineless Roads. Bed and Breakfasting along the KATY
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    An Good Ol' Fashion Appalachian Butt Whoopin'.

  5. #5
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    6, 7 and 8 are the same width; 9 is thinner and 10 thinner yet.

    You can use thinner (9/10) chains on 5/6/7/8 drivetrain, though I suppose there is maybe more risk lf the chain jamming between chainrings or something. But the key dimension, that is, the inner dimension where the teeth go, are the same for all the chains. 9/10 speed chains needs to be narrower on the outside dimension because of the closer cog spacing (fatter chains would rub adjacent cogs).

    6/7/8 speed chains are cheaper; I concur that the SRAM PC 58 is a great value. I really dislike the pin-replacement requirements on Shimano chains, and won't buy another Shimano chain if I can help it.

  6. #6
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    Quote Originally Posted by schang
    6, 7 and 8 are the same width; 9 is thinner and 10 thinner yet.

    You can use thinner (9/10) chains on 5/6/7/8 drivetrain, though I suppose there is maybe more risk lf the chain jamming between chainrings or something. But the key dimension, that is, the inner dimension where the teeth go, are the same for all the chains. 9/10 speed chains needs to be narrower on the outside dimension because of the closer cog spacing (fatter chains would rub adjacent cogs).

    6/7/8 speed chains are cheaper; I concur that the SRAM PC 58 is a great value. I really dislike the pin-replacement requirements on Shimano chains, and won't buy another Shimano chain if I can help it.
    Thanks very much for the info...

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