MODEL NO:RD-M7100-SGS SERIES:SLX M7100 Series Color:Series color Extra wide range 12-speed drivetrain -10-51T (12-speed) Compatible chain:HG 12-speed Total capacity:41T B-axle_Hollow axle:✔ Compatible chain HG:12-speed Mount_Direct attachment (Conventional):✔ Fluoric coated link bushings:7 MODEL NO:RD-M8100-SGS SERIES:DEORE XT M8100 Series Color:Series color Wide range 12-speed drivetrain with low sprocket combination -10-51T Compatible chain:HG 12-speed Total capacity:41T B-axle_Hollow axle:✔ Compatible chain:HG 12-speed Mount_Direct attachment (Conventional):✔ MODEL NO:RD-M6100-SGS SERIES:DEORE M6100 Series Color:Series color Compatible chain:HG 12-speed Total capacity:41T B-axle_Hollow axle:✔ Compatible chain:HG 12-speed Mount_Direct attachment (Conventional):✔.
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