The 525 VX3 chain has an 8% tensile strength increase due to the hardness of its inner plate, With the X-Ring material upgrade, the 525 VX3 chain has a greatly improved sealing performance and a wear resistance increase of 11%, Max cc rating of the 525 VX3 chain is 1000 cc, Increased rigidity as to reduce flex, which gives you a more responsive and smooth driving experience, 525VX3 boasts a 41% longer chain life than previous O-ring series due to D.I.D's patented X-Ring seal technology, VX Series chain is a great chain upgrade from OEM and is D.I.D's most popular and widely used chain on both on and off-road bikes