SRAM NX ( R) DER LONG CAGE 11 speeds BLK NX is SRAM's 1x drive train for the masses. All the key functionality features of high end 1x derailleurs are built in.     X-Horizon geometry     Same roller clutch and CageLock features as high end models     Cannot be used with double or triple chainrings Item Specifications     Weight: 322     Largest Cog: 42     Chain Wrap Capacity: 25 Color: Black Speeds: 11 Speed Cage Length: Long Cage