Sram Red 22 110 BCD Chainring Sram designed X-Glide R chainrings to be thicker in construction offering stiffness with upshift rivets. The Red 22 chainrings are constructed with 5mm of 7075-T6 aluminum. The CNC- machined aluminum machining allows for precision control of each tooth shape and ramp. The advanced shift timing pins and ramps for optimized shifting with Yaw Front Derailleurs. The Red 22 Chainrings are compatible with Sram Red 22 and Force 22 Yaw Derailleurs. X-Glide R technology 5mm 7075-T6 aluminum CNC-machined Compatible with Sram Red 22 and Force 22 Yaw Derailleurs | Sram | Force 22 Chainrings 110Bcd Outer | Black | 110Bcd, 50T, 11 Spd, Use W/34T