12 Speed Derailleur for 1x (51t Max)

Here you can find Deore XT RD-M8120-SGS Rear Derailleur 12 speed for 2x system 45t MaxDeore XT RD-M8100-SGS Rear Derailleur 12 speed for 1x system 51t MaxDeore XT SL-M8100-R 12 speed Shifter with bar clamp mount