Prestacycle UniBlock PRO Cassette (12 Speed) (Shimano)
— COMPATIBILITY — GEARS: 12 Speed SHIFTING: Shimano YBN 12 speed chains recommended for optimum shifting performance FREEHUB: Shimano HG11 AND the new HG12!(also fits HG10 with our HG10 Lockring, not included) — PERFORMANCE — Maximum Performance 12 Speed Shifting Interchangeable performance on all Drivetrains Ultra-Strong ChroMoly 3D Structure Ultra-Light – less material needed Larger, better-distributed Freehub engagement Easier to Clean Red alloy locknut included Features Prestacycle UniBlock Pro Cassettes Prestacycle UniBlock Pro Cassettes are a single-piece unit machined from a solid block of cold-forged Chrome Molybdenum alloy steel, then heat-treated, tumble-finished and electroplated for added durability and low-friction operation. ChroMoly alloyed steel is significantly stronger than materials used in other Cassettes including top-end OEM Cassettes and will last longer. The single block design offers 3D structure to optimize strength and distribute forces. This allow