DID CHAIN DID520ZVMX GG 112RH 4525516330213The D. I. D ZVM X Series utilizes patented X Ring seal and has greater strength than the VX Series and is designed for heavyweight motorcycles with high torque and horsepower. , The twisting action of the X Ring increases its sealing performance and its four contact points minimizes power loss., The ZVM X Series Direct Energy Transfer, born from our experience in MotoGP, means greater stretch resistance under load., The ZVM X chain is a great chain