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  1. #1
    Rat Bastard mcoomer's Avatar
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    What the heck is the difference???

    Can someone tell me the difference between these XTR rear derailleurs? RD-M972-GS and SGS. I can see that they're different in pictures but features make them different. I can't seem to find the answer on the Shimano site.

    Thanks,
    Mike
    It's better to burn out than fade away...or slip out of your pedal and face plant on the side of the road!!!

    '06 Cannondale Prophet
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  2. #2
    SPOON!!!!! lofnsjoke's Avatar
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    one is the short cage (gs) and the other is long cage (sgs)

  3. #3
    use your best eye kenhill3's Avatar
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    Someone correct me if I'm wrong, please-

    The difference is in the jockey cage length. Also specified in teeth capacity.

    GS is mid length. SGS is the long cage version, which wraps more chain - needed if when you have a wide gear range like 22/34/44 front and 11/34 rear
    "I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.

  4. #4
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    i think the diff is cage lenght, the gs has a lower "capacity" than the sgs, the sgs looks like the long cage version,


    edit: ^lol i got double beaten to it

  5. #5
    Svr
    Svr is offline
    Senior Member Svr's Avatar
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    SS = Super Sport (short cage)

    GS = Gran Sport (mid cage)

    SGS = Super Gran Sport (long cage)

  6. #6
    Shop Wench
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    Total capacity RD-M972:
    GS = 33 (enough for [22/32]x[11-34])
    SGS = 45 (enough for [22/32/44]x[11-34])

  7. #7
    Gravity hunter dminor's Avatar
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    Quote Originally Posted by Svr View Post
    SS = Super Sport (short cage)
    It will still fit in the trunk of your '67 Chevelle.

    Quote Originally Posted by Svr View Post
    GS = Gran Sport (mid cage)
    It'll still fit in the trunk of your Uncle's Buick.

    Quote Originally Posted by Svr View Post
    SGS = Super Gran Sport (long cage)
    Fold the back seat down Grandpa's Vista Cruiser.

  8. #8
    use your best eye kenhill3's Avatar
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    ^^^

    LOL, Doug!

    Still lust for a SS396.

    My mom had a '66 Nova , plain stock, bench seat, auto on the tree, basically unassuming by all appearances. The fact that it had (surprise!) a 327 was pretty much lost on her. But I knew better!
    "I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.

  9. #9
    Rat Bastard mcoomer's Avatar
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    I knew it would be something that I was looking at but not seeing. I guess that's what I get for trying to rush surf the net before clocking out at work. Mind was on other things.

    Thanks all,
    Mike
    It's better to burn out than fade away...or slip out of your pedal and face plant on the side of the road!!!

    '06 Cannondale Prophet
    '08 Specialized S-Works Stumpjumper
    '09 Specialized S-Works Tarmac SL2

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