Gear inches were calculated with a 29" X 3.0" tire.
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Shimano 12 Speed Deore XT: https://mtb.shimano.com/en/components/xt/
1x Crank: Gear options: 28 T, 30 T, 32 T, 34 T, 36 T
Cassette: 10-45 (small gear steps)
28 Crank = 18.9 to 85.4 GI
Cassette: 10-51 (wide gear range)
28 Crank = 16.8 to 85.4 GI
30 Crank = 18 to 91.5 GI
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2x Crank: 36-26 T
Cassette: 10-45 (small gear steps)
17.7 to 110 GI