Superior quality X-ring chain - Up to 650cc streetbikes. Will custom cut to any length. EK SRX series chains are an excellent value for any street machine up to 650cc. They feature lightening holes, reduced friction, and Quadra-X Rings that increases chain life from 1 1/2 to 2 times longer than a standard O-Ring chain. Specifications- 520 SRX Gold Pitch- 5/8in. or 15.875mm Width- 1/4in. or 6.35mm Pin Size- Dia.- 5.38mm Length- 21.50 mm Roller Dia.- 10.16mm Plate Thickness- Inner- 2.20mm Outer- 2.20mm Tensile Strength- 8,500lbs. or 37.8kN Wear Life Index- (Std. as 100)- 1,200 True Weight (100 Links)- 3.70lbs. or 1.68kg Conn. Link- Std.- SKJ (Clip Type) Opt.- MLJ (Rivet Type), SLJ (Screw Type)