The 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-Ringﾮ increases its sealing performance and its four contact points minimizes power loss., The ZVM-X Seriesﾒ Direct Energy Transfer, born from our experience in MotoGP, means greater stretch resistance under load., The ZVM-X chain is a great chain for high powered street bikes but may also be utilized on adventure bikes.