The Ultimate Sportbike Chain: The SRX2 Series chains are an excellent value for any street machine. The SRX2 chains feature lightening holes, reduced friction and Quadra X-Ring design which increases chain life from up to two times longer than standard O-Ring chain. Can be used for street or dirt. Max displacement: Street - 750cc / Dirt - 650cc. Tensile strength: 8500 pounds. Quadra X-Ring design - QX-Ring is 40% less friction and 150% more durable. Lightening holes reduce weight without compromising strength. Comes with clip-style master link; rivet and screw types sold separately.