11Tooth MTB Ceramic Bearing Wheel Pulley Road Bicycle Bike Derailleur Features: new and Quantity: 1 Pc new and Bike Cycling Aluminium Wheel Rear Derailleur Pulley 11T Teeth: 11T Bearings: Upgraded bearing. Design for outdoor Bike Type: 11 Gear Guide Pulley Color:Black,Blue,Purple,Red,Gold, Material: Aluminium Size: 5mm (D) Net Weight:10.7g Inner diameter:about 5.2mm Note: 1.Transition: 1cm=10mm=0.39inch 2. allow 1-3mm error due to manual measurement. pls make sure you do mind before you bid. 3.Due to the difference between different monitors, the picture may reflect the actual color of the item. Thank you! Package Includes: 1 x Wheel Rear Derailleur Pulley (11T) High-Performance Tires:Upgrade your cycling experience with our high-performance tires. Engineered for optimal grip and durability, these tires ensure a smooth ride on various terrains, enhancing your biking adventures. Ergonomic Saddle for Comfort:Experience unparalleled comfort during long rides with our ergonomic saddle. Designed with rider comfort in mind, it provides the perfect blend of support and flexibility, allowing you to enjoy every journey. Precision Gear Shifting System:Take control of your ride with our precision gear shifting system. Smooth transitions between gears guarantee a seamless cycling experience, allowing you to effortlessly adapt to changing terrains and speeds. Lightweight and Durable Frame:Our bicycle frames strike the perfect balance between lightweight design and durability. Crafted from high-quality materials, they ensure a sturdy yet agile ride, making your cycling adventures both enjoyable and reliable. Advanced LED Lighting System:Illuminate your path with our advanced LED lighting system. Whether you're cycling in low-light conditions or exploring the great outdoors at night, these lights provide enhanced visibility and safety for a worry-free biking experience.