The Lifeline Stainless Steel Disc Rotor 180mm is a high-quality, durable brake rotor designed for various types of bikes including single speed, road, mountain, and more. Made of steel and weighing just 0.5 kg, this silver rotor is compatible with most bike brands and features a 6 bolt mounting type for easy installation. With a diameter of 180mm and a unit quantity of 20, this one-piece rotor is a reliable choice for enhancing your braking system and ensuring a smooth and safe cycling experience.