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  1. #1
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    Shimano Saint M820 RD "Mode Converter" question

    I'm in the process of tweaking my new saint m820 rd and noticed I didn't install the mode converter. I'm ridng xc/am and have a 11-34 cassette and xt 2x10 crank. Just out rididng on flat stuff it seems to be shifting very smoothly but not sure why the converter is needed. The only thing I was able to find was saying it was to prevent the chain from hitting the chainstay. Can anyone provide some feedback on this.
    thanks

  2. #2
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    The converter is for running a narrower range cassette for downhill. Don't need it if you are running what you have on there.

  3. #3
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    Interesting, when I set up my M820 with an 11-36 cassette, the only thing I could find was the M810 tech document. In there it says that if you want to run all mountain style (you know 11-34, 11-36, 12-34 type cassettes) you need the mode converter!

    Actually it has a little chart, and for all mountain it has an X, and for DH a - (dash). I took that to mean X marks the spot and installed the converter.

    For what its worth, it works perfect. I mean, real good. I been running Sram X0 - X9 since I switched to 9 speed and 10 speed. Never used a Shimano 9 speed setup. This 10 speed Shimaon setup I have is like butter man, big improvement.

  4. #4
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    Quote Originally Posted by wschruba View Post
    The converter is for running a narrower range cassette for downhill. Don't need it if you are running what you have on there.
    What subydoo said, it's completely the opposite for the M810 derailleur. You need the converter for anything that's not a short range road cassette.

  5. #5
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    OK let me get this straight, you don't need the converter on M810 for the non road cassette and you do need it for the M820?

    Is that right? I have it on the M820 with 11-36 cassette.

  6. #6
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    I ran it off for 2 20k rips on the weekend. I was only on flat land but the gears performed flawlessly. Who knows maybe i will put it on and try it next weekend and compare.

  7. #7
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    Shimano dealer's manual says that you need mode converter. Page 8

    Mode converter (RD-M820)
    This derailleur is compatible with two types of sprockets: Freeride mode (11-32T/11-34T/11-36T) and downhill mode (11-23T/12-
    25T/11-28T).
    If using the freeride mode sprockets, you will also need to use the mode converter.

    Mode converter (RD-M810)
    About the mode converter
    This derailleur is compatible with two types of sprockets: All-mountain mode (11-32T/
    11-34T) and downhill mode (11-23T/12-25T/11-28T). If using the All-mountain mode
    sprockets, you will also need to use the mode converter.
    Last edited by irrah; 04-03-2013 at 09:35 AM.

  8. #8
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    I think they refer the mode converter as the "B" Link. But yes, if going to a 11-36 cassette, you will need the longer "B" Link.

  9. #9
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    Quote Originally Posted by irrah View Post
    Shimano dealer's manual says that you need mode converter. Page 8

    Mode converter (RD-M820)
    This derailleur is compatible with two types of sprockets: Freeride mode (11-32T/11-34T/11-36T) and downhill mode (11-23T/12-
    25T/11-28T).
    If using the freeride mode sprockets, you will also need to use the mode converter.

    Mode converter (RD-M810)
    About the mode converter
    This derailleur is compatible with two types of sprockets: All-mountain mode (11-32T/
    11-34T) and downhill mode (11-23T/12-25T/11-28T). If using the All-mountain mode
    sprockets, you will also need to use the mode converter.
    Thanks for the link wih tthe dealers manual.

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