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@moog
I’m sure this has been asked and answered before but I’m currently on tour with just my phone and patchy internet so my UTFS skills are low.
I have an XT M781 rear mech and GRX 2x10 cranks and want to lower the gearing beyond the Shimano recommendations.
Mech - max capacity 43t, max cog size 36t
Cranks - 46/30
I’m currently running an 11-36t cassette but would like to change to 11-40t or 11-42t.
How much over the quoted shimano tolerances can I push the tooth count?