Features1Hollow Design: Features a large area of hollow design on the brake rotor, significantly reducing weight and increasing air contact area, thus speeding up the cooling of the brake disk. 2Stable Performance: The 140mm bike disc brake rotor is designed to handle damp environments, ideal for long term, long distance use. Its thickened structure provides added safety and stability. 3Easy Installation: The 140mm disc brake rotor is easy to install on the disc brake frame and the forks. It's compatible with mountain bikes, road bikes, as well as electric bikes. 4Steel Construction: Crafted from steel, the 140mm bike disc brake rotor has effective anti rust properties and high strength. It is not easily distorted, proving its durability. 5Stable Operation: Rely on this 140mm disc brake rotor for stable and reliable braking performance across various terrains ensuring your safety and enjoyment while cycling.SpecificationItem Type: Bike disc brake rotorMaterial: SteelWeight: Approx. 138g / 4.9ozOuter Diameter: 140mm / 5.5inInner Diameter: 37mm / 1.5inPackage List1 x Bike Disc Brake Rotor