epessa crank arm left available in diamond hole and square hole,170mm epessa <p>note note notes:</p> <p> </p> <p>1. please check the interface of your right crank arm is square or diamond. keep both left and right arms have the same hole;some gym bikes may not be available, please confirm the length and connection port;</p> <p> </p> <p>2.the hole spacing of this crank arm is 170mm, please make sure that the two center of holes length of your original crank is 170mm </p>