A practical choice for MTB, e-MTB or bikepacking riders who need 12-speed Eagle compatibility, a 50T climbing gear and a standard splined freehub body.
The SRAM PG-1230 Eagle Cassette is a 12-speed MTB cassette for a 1x Eagle drivetrain, giving you a broad 11-50T range and a 520% spread between the smallest and largest sprockets. That makes it a strong choice for trail riding, long climbs and loaded bikepacking where dependable low gearing matters.
Its splined 8, 9, 10-speed driver-body interface works with the common Shimano HG-style freehub standard, making it a straightforward option for compatible wheels. The 12 sprockets use optimised steps from 11, 13, 15, 17, 19, 22, 25, 28, 32, 36, 42 and 50 teeth, so you get useful progression rather than a single oversized climbing cog.
PowerGlide II tooth profiles and shift ramps are designed for quick, positive indexed shifting in off-road conditions. The black-finished cassette is a sensible replacement or upgrade for compatible SRAM Eagle builds, including 12-speed 11-50 Eagle systems using NX Eagle rear derailleurs and NX Eagle single-click shifters. Before ordering, check that your rear wheel has the required splined driver body rather than an XD interface.
520% gear range
The 11-50T spread gives you a low climbing gear for steep terrain without sacrificing useful speed on flatter sections.
12-speed Eagle gearing
Designed as part of the SRAM Eagle 1x ecosystem for compatible Eagle shifters, chains and rear derailleurs.
Standard splined interface
Fits compatible 8, 9 or 10-speed splined driver bodies, providing an alternative to XD-specific Eagle cassettes.
PowerGlide II shifting
Optimised tooth profiles and shift ramps help deliver quick, positive indexed shifts off-road.
Practical sprocket progression
The 11-50T sequence uses 12 defined sprocket sizes to give useful steps across the complete range.
NX Eagle system fit
Listed for 12-speed, 11-50 Eagle systems using NX Eagle rear derailleurs and NX Eagle single-click shifters.
Trail-ready black finish
The black cog finish gives your drivetrain a clean, understated appearance.
General
Gearing
Construction and finish
Compatibility
Dimensions and weight
PowerGlide II
Off-road cassette technology with an optimised tooth profile and shift-ramp design for reliable, durable performance and quick, positive indexed shifting.
Eagle
A lighter, simpler and more durable 1x drivetrain platform with an expanded 520% gear range, giving you broad climbing and trail-riding capability.
SRAM is an American bicycle component manufacturer founded in Chicago in 1987. The company produces cycling components for road, gravel and mountain bikes, including drivetrains, brakes, suspension, wheels and electronic systems.
SRAM began with Grip Shift gear-change technology and expanded through product development and acquisitions across the cycling component market. Its portfolio includes SRAM, RockShox, Avid, Truvativ, Zipp, Quarq, Hammerhead and other cycling brands.
