CS-PG1230 Cassette 11-50T 12-Speed NX EagleSRAM NX Eagle PG 1230 Cassette 11 50T 12 Speed The SRAM NX Eagle PG 1230 cassette is a wide range 12 speed mountain bike cassette built for riders who want Eagle gearing without needing to upgrade to an XD driver. With an 11 50T range, it gives you plenty of climbing gear for steep trails while still keeping enough speed for flatter sections and faster trail riding. Designed as part of the SRAM Eagle drivetrain ecosystem, the PG 1230 uses PowerGlide