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  1. #1
    Mountain Man Dan
    Reputation: ProjectDan35's Avatar
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    Sram pc951 vs pc971............why?

    Just a question. I was looking around at 9 speed chains for when I go to replace mine. I was specifically looking at the SRAM pc 951 and 971. Going by numbers, the 971 is a little bit higher end. But, they are IDENTICAL and the 951 is lighter by 1 gram. Why do they have 2 chains that are the same, but have different numbers. Look.

    971- http://www.pricepoint.com/detail/168...p=070%20SRA718

    951- http://www.pricepoint.com/detail/168...p=070%20SRA518

    What makes the $7 price difference?

  2. #2
    Fat-tired Roadie
    Reputation: AndrwSwitch's Avatar
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    PC-971's prettier. The silver links are plated with something. Nickel? I forget. It's for corrosion resistance, supposedly, but I don't quite get it - it seems like the inner plates would still rust.
    "Don't buy upgrades; ride up grades." -Eddy Merckx

  3. #3
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    PC-951 no plating
    PC-971 outer plates nickel plated
    PC-991 inner and outer plates nickel plated
    PC-991 Cross Step same as 991 but something in the rivets is stronger
    PC-991 Hollow Pin same as 991 but pins are... hollow

    The nickel plating makes the chain more shiny (pretty) and should last a bit more if you frequently ride in wet weather.

  4. #4
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    Some of those plating 'improvements' are designed to make the chain shift smoother too. Not sure if its smoke and mirrors, but top-end chains do seem to be nicer with shifting (?placebo effect)
    Rimmer - "There's an old human saying - if you talk garbage, expect pain"

  5. #5
    Mountain Man Dan
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    Ah. That explains everything. Thanks.

  6. #6
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    Take your chain off.. Put it in a small bowl. Put Works toilet bowl cleaner on the chain. The cleaner will eat off any rust or corrosion. Rinse it good with water afterwards then let the chain dry good in the sun.. Then I soak it in my silicone spray for an hour.. Slap it on and you wouldnt belive the life you get out of your chains.. I do this at the end of each season and it keeps my cheap pc951 good..

  7. #7
    Former Bike Wrench
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    Half the price, 1.5x the pin pull strength of the PC 971

    http://www.treefortbikes.com/product...ilver-and.html

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