Shimano XT RD-M8000 Rear Derailleurs46 tooth maximum rear cog for 1x11, 42 tooth maximum for 2x11 and 40 tooth maximum for 3x11Low profile derailleur cage reduces collection of debris and potential for damageShadow clutch reduces chain slap and dropped chains, on-off switch allows for simple wheel changesExternally adjustable clutch for easier spring tension adjustmentOptimized slant angle lowers shift effort while improving shifting and driving stabilityNOT compatible with M8130 Linkglide shiftersItem SpecificationsCage LengthMediumChain Wrap Capacity (teeth)39ColorBlackDrivetrain Speeds11Largest Cog46Rear Der/Shifter CompatibilityShimano MountainRear Derailleur Mount Type10x1 StandardRear Derailleur Mount TypeShimano Rear Direct MountWeight271 Shimano XT RD-M8000 Rear Derailleur Rear Derailleur UPC: 689228919990