• I've just checked to be 100% XT gs will do 11-42 as I've got it setup. Shimano tech docs and Madison say xtr di2 gs and sgs will only do 40t max as the lowest.

  • XTR GS med cage will do a 42t 100% on a 1x setup. It was released at a time when they only made a 40T max cassette (hence the 40t max listing).

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