Shimano Dura Ace R9200 12 Speed Cassette

Super lightweight 12speed HG+ cassette with a rigid carbon and alloy carrier for excellent shifting even under the most demanding gear changes.Key Features:Hyperglide+ sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under loadClose ratio gearing allows a more efficient use of energy through finer cadence controlLargest sprockets are mounted on lightweight alloy and carbon carriers to reduce weight and increase rigidity5 largest sprockets are made from titanium to reduce weight without sacrificing strengthSprockets are extensively cut away and drilled to further reduce weight without reducing rigidityNickel-plated finish offers hard wearing resistance to corrosionAlloy cassette lockringFor Super Narrow 12-speed chains - Manufacturers part numbers: Shimano_CSR920012134|ICSR920012134|CSR920012134

• 12 Speed HG Compatible Chain
• Compatible with new 12v rear hub body and 11v road hub
• Adding wider 34D specs for pro-race use
• Refined 12 step progressivity maximizes efficiency and acceleration performance for all situations
• Faster and smoother gear change even with maximum pedaling loads