The 520 ERV7 chain boasts a 3% higher tensile strength due to stronger inner side plates and thicker pins. Due to increased X-Ring durability, the ERV7 sees a 13% wear resistance increase. 520ERV7 is the top-of-the-line racing chain for all types of motorcycle racing, on and off road. Incredible design and utilization of D.I.D's patented X-Ring seal technology makes the ERV7 a top performing racing chain available. Utilized by many factory teams worldwide.
