The sram pg 1130 11 speed cassette features the latest technologies and patents from sram to deliver superior road biking performance this cassette is ideal for road bikers in need of that extra push on climbs and those long tracks crafted from heat treated steel and aluminium this sram 11 speed cassette is impenetrably durable and will perform seamlessly under the most intense strain and on the most aggressive of terrains this 11 speed cassette is incredibly reliable and will securely move