SHIMANO DEORE XT M8100 12 Speed Groupset include RD-M8100-SGS Rear Derailleur and SL-M8100-R SL-M8100-IR Shifter Original Parts - AliExpress Sports & Entertainment
SHIMANO XT RD-M8100 SGS vs GS DERAILLEUR // WEIGHT AND DIFFERENCES BETWEEN MEDIUM AND LONG CAGE - YouTube