In developing the Pro-Street VX Series, D.I.D focused on improving chain “Rigidity”. Traditionally, “Tensile Strength” has been used to measure the strength of a chain. But Tensile Strength is only a laboratory measurement of a chain’s “breaking point”. Rigidity increases a chain’s ability to withstand forces that occur in a rider’s real world experience. Rigidity increases power transfer from the engine to the ground and greater resistance to stretching under load. This translates into smooth handling and quicker response time. To maximize performance, ZVM-X chains have D.I.D’s race proven low friction X-Rings. D.I.D’s PRO-Street VX Series Chains are a perfect match for your dual sport, sport bike or sport touring bike.