Features: The bike disc brake Rotor is make of metal, with high strength, not easily to deforms, and excellent rusts prevention and wear resistance. The polygonal airflows designs and large hole spacing provide good heat dissipation performances and reduce brake attenuation and warpage, thus ensuring excellent brake performances. Excellent dry and wet performances, good wear resistance, quickly ventilation and good heat dissipation. Used as front disc brake bike and rear disc brake bike, easily to install. The rotor antiloosen plate construction make for quick and secure installation. Specifications: Materials: Metal Style: RT64 Center Lock 140mm/RT64 Center Lock 160mm/RT70 Center Lock 140mm/RT70 Center Lock 160mm/MT800 Center Lock 140mm/MT800 Center Lock 160mm/CL800 Center Lock 140mm/MT900 Center Lock 160mm/RT66 Six Nails 180mm/RT86 Six Nails 160mm/RT86 Six Nails 203mm/RT76 Six Nails 180mm Diameter: 140mm/5.51inch; 160MM/6.3inch; 180MM/7.09inch; 203MM/7.99inch Package Includes: 1pc Bike Disc Brake Rotor note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.