DID 525 ZVM-X2 Chain730662042 Product Description ZVM X Series utilizes D. I. D's patented X Ring seal and has greater strength than the VX Series and is designed for heavyweight motorcycles with tremendous torque and horsepower ZVM X Series Direct Energy Transfer, born from our experience in MotoGP, means greater stretch resistance under load Twisting action of the X Ring increases its sealing performance and its four contact points minimizes power loss ZVM X chain is a