Zenlux Deore M6100 SLX CS-M7100 XT M8100 12 Speed Sprocket Compatible with Shimano 10-51T Cogs Mountain Bike Freewheel Bike Micro Spline Cassette (CS-M7100)

Designed with Micro Spline body that features smaller and more widely distributed splines to limit cog damage on freehub 10-51T wide range 12-speed gear combination Provides better chain engagement, stronger retention, and smoother pedaling with greater power and confidence over rapidly changing terrain Light and stiff construction reduces cassette inertia resulting in faster acceleration and increased chain security Advanced shifting performance provides the confidence to enjoy any trail