Shimano CS-M9101-12 Cassette - 12-Speed, 10-51t, Black/Gray, Micro SplineShimano XTR CS M9100 cassette features better chain retention and ground clearance. This cassette is built with a strategic application of aluminum, titanium, and steel materials for an optimal blend of weight savings, rigidity, and durability. Product Details: Compatible with Shimano Hyperglide+ chains Hyperglide+ technology offers better chain engagement, stronger retention, and smoother pedaling for greater power and confidence over rapidly
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