The VX Series chain is a great chain upgrade from O.E.M. and is D.I.D's most popular and widely used chain on both on and off-road bikes. The 525VX3 boasts a 41% longer chain life than the VO Series due to the patented X-Ring seal technology. It also has increased rigidity as to reduce flex, which gives you a more responsive and smooth driving experience. Max cc: 1,000cc. Tensile strength: 9,980 pounds. Weight (per 100L): 4.09 pounds. Seal: X-Ring. Chain life index: 4000. Pin length: 0.866". Pin diameter: 0.217". Inner plate thickness: 2.2. Outer plate thickness: 2.2.