SRAM X-Sync Pulley Assembly
Original equipment rear derailleur pulleys for SRAM rear derailleurs. Wide-narrow pulley tooth profile holds the chain better Stainless steel sealed cartridge bearings Fits X01, X01DH, X1, GX 1x11, NX, Force CX1, Force 1, Rival 1, Apex 1 Derailleurs Fits Brand: SRAM Drivetrain Speeds: 10 , 11.