Shimano CS-M9101-12 Cassette - 12-Speed 10-51t Black/Gray Micro Spline MFPN=01507360000 This gravity oriented 4-piston brake

This gravity oriented 4-piston brake borrows features from Maguras motor sports line to provide maximum stopping power at low weight

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Shimano CS-M9101-12 Cassette - 12-Speed 10-51t Black/Gray Micro Spline MFPN=01507360000 This gravity oriented 4-piston brakeShimano 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. Compatible with Shimano Hyperglide+ chains Hyperglide+ technology offers better chain engagement stronger retention and smoother pedaling for greater power and confidence over rapidly changing terrain Micro Spline