SRAM X-O PG-990 9-spd Mtb Cassette 11-34T RED

Five-arm, CNC-machined aluminum spider provides a rigid foundation. Includes a precision-forged 7000 series aluminum lock ring. Technology PowerGlide II Speeds 9 Speed Recommended Chain PC-991, PC-971 Lock Ring Material Anodized Alloy Sprocket Material Blasted Chrome Plated PowerGlide II PowerGlide II Cassette technology optimized for offroad. More reliable. More durable. Better performing, thanks to an optimal tooth profile and shift ramp design for quick and positive index shifting. Go climb a mountain.