The SRAM XX1 Eagle 12-speed cassette is one of the most durable and stiff cassettes on the market. SRAM achieves this by milling the cassette from a block. This manufacturing technique also allows the weight to be kept extremely low even with durable steel pinions. Only the 50 end pinion is made of aluminum. Compared to the XX1 cassette, the individual sprockets have been optimized for an improved shifting performance and an improved fit of the chain. Key Features: - Material 1-11 sprocket: steel- End pinion material: aluminum- Technology: X-Dome- Switching stages: 12- Gradation: 10-12-14-16-18-21-24-28-32-36-42-50- Translation bandwidth: 500%- Compatibility freewheel: 11-, 12-speed SRAM XD MTB- Drive compatibility: SRAM 12-speed drives

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