FYI to those looking for more gearing capacity at the rear.
There is a hack possible with the Shimano GRX RD-RX812 rear Mechs.
The body of these mechs are the same as the XT. Compare the shape of clutch housing.
As per the specs the RD-RX812 have a low capacity (31T) due to a medium sized cage and thus are intended to be limited to 1x.
However by changing to the long cage of the XT, you get the same capacity as the XT RD-M8000-SGS of 47T.
Running a 16T difference on the front and an 11/42 on the rear is no issue. Shifts fantastic.
Pic of the XT SGS cage parts below.
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