As the lightest option in the Eagle lineup, the XX1 12-speed cassette is what we throw on our most elite dream builds. Available in 10 - 50 and 10 - 52t configurations, this cassette boasts a 500 - 520% usable gear range that propels us up grueling climbs and keeps us from spinning out when we're cranking at top speed. The cassette features SRAM's X-Dome architecture to deliver one of the strongest and most consistent performing cassettes on the market, and it's finished with Ti Nitride, which helps shed mud and ensure smooth, reliable shifting in all conditions while looking oh-so-slick in the process.