FULL PIN™ technology uses eleven lightweight, stamped steel cogs held together with 123 high-strength stainless steel pins.The result: a cassette that's light, durable and equipped with SRAM's super wide 10-42t gear range that's a perfect fit for any ride. The open design similar to the X-DOME™ cassette aids in mud clearance, giving you cleaner shifting performance and longer component life.Features:FULL PIN™ technology uses eleven lightweight, stamped steel cogs held together with 123 high-Optimized gear steps across entire rangeOpen design aids in mud clearanceXD™ driver body creates more stable hub connectionSpecifications:Speed (CS): 11sGearing: 10-42tCog finish (Cassette): BlackTechnology (Cassette): XGCog sizes: 10-42t:10,12,14,16,18,21,24,28,32,36,42