Sram PG-1230 EAGLE CASSETTEDESCRIPTIONRide anywhere with the wide-range PG-1230, 11- to 50-tooth Eagle cassette. The NX cassette gives riders every bit of the climbing range that the Eagle(TM) ecosystem affords with a simple upgrade to splined-drive body wheels.MODEL IDCS-PG-1230-A1FEATURESCompatible with a splined driver body.This PG-1230 cassette is an integral part of the SRAM Eagle drivetrain Ecosystem.Wide 11-50t gear range-a perfect fit for any ride. Optimized gear steps across entire range.GYPOWERGLIDE IICassette 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.EAGLEEagle technology represents our newest 1x drivetrain technology. Eagle is a lighter, simpler, more durable, and easier to use drivetrain. Eagle features all-new 1x components, engineered for even greater durability and performance while maintaining a significant weight advantage over other drivetrain solutions. Eagle technology also provides an expanded gear range of 520%, which is equal to 2x11 drivetrains.