SHIMANO CS-M9100 Ring Axe 12S

Features: - Let you pedal continuously while shifting - Increased Acceleration By Reducing Inertia And Weight By Beam Spider Construction - Definitive shifting - New Micro Spline * Construction To Engage Freehub Body Specifications: - Average Weight: 357 G (10-45t), 367 G (10-51t) - Combination: 10-12-14-16-18-21-24-28-32-36-40-45t, 10-12-14-16-18-21-24-28-33-39-45-51t, -, -, -, -, - - Combination Name(Group Name): 10-45t, 10-51t - Compatible Chain: Cn-M9100 - Speeds: 12-Speed - Spider Arm_Qty (Pcs): 1 - Type: Hyperglide+ Technology: - Micro Spline Delivers Lightweight Aluminum Freehub Body To Reduce Weight And 10 Teeth Top Gear. - Use Combination With Micro Spline Cassette Sprocket And Freehub. - Micro Spline Patents Are Pending Benefits & Features: - Lightweight Aluminum Micro Spline Freehub Seamlessly Integrates With Small 10-Tooth Top Gears. - Smaller And More Widely Distributed Splines Limit Cog Damage On Lightweight Aluminum Freehub.