Easton 11 speed asymetric chainringthis superb chainring is specifically designed for use with easton cinch cranks for top notch performance'. '.strtoupper('i')ts 7075 t6 aluminium construction makes it tough enough for the most aggressive off road rides, so you can stay at the top of your game'. '.strtoupper('a')dditionally, its asymmetric four arm design allows for greater stiffness in the power zones of your pedal stroke'. '.strtoupper('t')his is the ultimate choice of upgrade for a smoother and more precise pedal stroke performance all across the mountain.features material 7075 t6 aluminium use mtb asymmetric four arm shape for greater stiffness in the power zones of the pedal stroke compatible with 9, 10 and 11 speed chains arm x bcd 4 x 110 asymmetric for easton cinch cranksbuy easton components from chain reaction cycles, the world's largest online bike store.