The Shimano RT30 180mm Centerlock Disc Brake Rotor is a high-quality bike component suitable for a range of cycling disciplines including road, hybrid, cyclocross, gravel, hardtail, racing, trekking, and mountain biking. Made of durable steel with a silver colour, this rotor comes with a lock ring for easy installation and reliable performance. This set includes one rotor and one lock ring, designed for centre lock mounting, providing optimal braking efficiency and durability for your cycling adventures. Resin Pads Only.