The 520 ERV7 chain boasts a 3% higher tensile strength due to stronger inner side plates and thicker pinsDue to increased X-Ring durability, the ERV7 sees a 13% wear resistance increase Chain Size520Chain Type520 ERV7Color/FinishGoldMaster Link ConnectorRivetMaximum Engine Displacement (Street)750 ccModelERV7 SeriesNumber of Links120Product NameDrive ChainSeal TypeX-RingTensile Strength38,5 kN (8660 lb)UnitsEachVendor part number4525516361255