The SRAM XG-1150 Full Pin Cassette 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 cassette aids in mud clearance, giving you cleaner shifting performance and longer component life. FULL PIN technology uses eleven lightweight, stamped steel cogs held together with 123 high-strength stainless steel pins Super wide 10-42t gear range is a perfect fit for any ride Optimized gear steps across entire range Open design aids in mud clearance XD driver body creates more stable hub connection