Features: The bike disc brake rotors is made of high-quality metal, with high strength, not easy to deforms, and excellent rust prevention and wear resistance. The polygonal airflows design and large hole spacing provide good heat dissipation performance and reduce brake attenuation and warpage, thus ensuring excellent brake performance. Excellent dry and wet performance, good wear resistance, quickly ventilation and good heat dissipation. Used-as front disc brake bike and rear disc brake bike, easy to install. Mountainous bike rotors are available in three sizes of 160mm/180mm/203mm. You can choose at will . Specifications: Material: Metal Diameter: 160mm (6.30inch)/180mm (7.09inch)/230mm (9.05inch) Center Distance: 44mm/1.73inch Package Includes: 2x Bike Disc Brake Rotors note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.