¡¾Premium Material¡¿:This bike belt drive plate is made of safe and sturdy PP material, with high stability and strength, and reliable performance¡¾Easy to Replace¡¿: The exercise bike tension belt disc is easy to install and use¡¾Replacement Accessories¡¿: This dynamic bike belt wheel disc is made of quality PP material and can withstand high intensity training. It is a necessary accessory for indoor cycling enthusiasts¡¾Smooth and Efficient¡¿: The fitness bike part adopts a belt drive design to ensure smooth and efficient operation during exercise¡¾Function¡¿:Fitness stationary bike belt drive disc is great for enhancing your indoor cycling or fitness experienceSpecification:Material: PP IronSize Chart:Outer Diameter: 18cm/7.09inchHexagonal Shaft Available:1.7cm/0.67inch 2cm/0.79inchPackage Includes:1 Exercise Bikes Drive Belt DiscNote:Please allow slightly errors due to manual measurement and different monitors.