FULL PIN(TM) 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 our X-DOME(TM) cassette aids in mud clearance, giving you cleaner shifting performance and longer component life. FEATURES a FULL PIN(TM) technology uses eleven lightweight, stamped steel cogs held together with 123 high- a Optimized gear steps across entire range a Open design aids in mud clearance a XD(TM) driver body creates more stable hub connection