Features 1、Durable Materials: This bike disc brake rotor adopts stainless steel and aluminium alloy, which is sturdy and durable, anti wear and deformation, has a long service life. 2、Hollow Design: This 140mm disc brake rotor adopts hollowed design, and the edge increases the friction coefficient of the disc, which ensures better braking effect. 3、Widely Compatible: This lightweight bike brake rotor is suitable for disc brake with center lock structure(Quick release and roller bearing are compatible). 4、Lightweight: This 140mm disc brake rotor is light in weight, and won't put too much burden on the bike. The particular shape ensures better wear resistance, heat dissipation and fast ventilation. 5、Easy Installation: This disc brake rotor in diameter of 140mm can be easily installed with the accessory included in package. Suitable for replacement for road bikes and mountain bikes. Item Type: Bike Disc Brake Rotor Material: Stainless steel, aluminum alloy Gross Weight: 163g / 5.7oz Diameter: 140mm / 5.5in Application: Suitable for Disc Brake Hub with Center Lock Structure(Quick Release and Roller Bearing Are Compatible). Package List 1 x Bike Disc Brake Rotor 1 x Accessory