I really have done searches for the answer to this seemingly easy question, but didn't come up with anything. Do the newer Shimano rear derailleurs (M771, etc.) still use a 2:1 ratio? I like my SRAM Attack twist shifters, but would like to get a new rear derailleur and wanted to make sure I wasn't going to run into compatibility problems with a new Shimano one.
Mtbr's 2016 Winter Biking GearReviews and Roundups
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