EK Chain 520 SRO Chain The SRO Series presents an O-ring chain that marries affordability with unwavering quality and endurance. Including innovative features such as lightning holes and crafted with advanced heat-treated steel alloys, this chain embodies the exceptional quality and dedication that EK integrates into its comprehensive product range. Features: Can be used for street, touring or dirt motorcycles Compatible displacement: up to 650cc Tensile strength: 8500 lbs. O-ring Lightening holes reduce weight without compromising strength Clip type master link