Que relación máxima y mínima de piñones puede manejar? 11-45, 11-50, 10-50?

Shimano xtr puede soportar un piñón 10-51 y también 10-45 y 11-50 pero está echo para soportar 10-51

Can i replace an xt derailuer for m8000 1x10 wi this? is there a specific model to chose for this swap?

No, The M9100 is very specific to gear size and cassette size either sg & sgs and are not interchangable even on 12 speed specific. Also the cogs are specific to not only 12 speed but to shimano hyper glide chain only, Using this with any other components will leave you dissatisfied. I also tried this with my 1x10 and ended up going to full 1x12 shimano everything. This the best shifting on the market. If you want to keep 1x10 stay with the M8000 again this will be the best shifting on the market if you use shimano chains

Manufacturer	Shimano
UPC	689228880269
Item Package Dimensions L x W x H	6.1 x 6.02 x 3.9 inches
Package Weight	0.41 Kilograms
Item Dimensions LxWxH	7 x 7 x 5 inches
Brand Name	SHIMANO
Suggested Users	mens
Number of Items	1
Part Number	IRDM9120SGS
Size	SGS 12 Speed

XTR Rd-M9120 Rear Derailleur Stealth Gray, Sgs 12 Speed

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