Sram XX1 Cogs Lunar 10-52TThe new 10 52 Eagle cassette for riders who prioritize all day function over anything else. With an expanded, 520 percent gear range giving riders more ability to spin and recover on the burliest climbs. Featuring FULL PIN technology that uses lightweight, precision engineered steel cogs permanently connected with high strength stainless steel pins. An open design similar to our X DOME cassette that aids in mud clearance, giving riders crisp shifting