The SRAM x-glide 11-speed chain ring is 5mm thick for added stiffness and decisive shifting control. With the same upshift rivets that make sram's XX mountain group set so fast, the x-glides are made from CNC-machined 7075-t6 aluminum for precise shape and ramp. Ideal for use with SRAM x-glide chains, chain rings, and front derailleurs, this 11-speed chain ring ensures you can always find the next gear when you need it.