The centrepiece of SRAM's Eagle drivetrains are the 12-speed cassettes, and the PG-1230 Eagle Cassette forms the centrepiece of the NX Eagle groupset, yet is still compatible with any other SRAM Eagle drivetrain. The PG-1230 though has a few features that set it out from the rest of the pack.11-50t range provides massive gear range and fits on regular freehub bodyPowerGlide II technology provide, smooth, slick shifting in all conditionsSteel and alloy construction is highly durable and is rated for e-bike useOnly compatible with HG 9/10 Speed freehub bodies - not compatible with SRAM XD 11/12 Speed freehubsSince the introduction of SRAM's XX1 and X01 Eagle drivetrains, the world has waited with baited breath to see when the technology would trickle down to lower price points. GX Eagle led the way and now SRAM's Eagle technology is available right down to NX level. The PG-1230 forms the basis of the NX Eagle Groupset, by providing the same wall climbing 50t bottom cog as the other group