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Old 05-13-09, 03:32 PM
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Location: Sammamish, WA
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Bikes: Cannondale Prophet, Specialized S-Works SL2, Specialized S-Works Stumpjumper

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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.

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