Enhance your cycling performance with this high-quality Bicycle Rear Derailleur Pulley, designed to deliver smooth and reliable gear shifts. Crafted from durable metal ceramic material, this pulley features advanced ceramic bearing technology for reduced friction and improved transmission efficiency, ensuring a smoother and more effortless ride. Key Features: · Deep Tooth Guide Wheel: Effectively reduces chain drop, providing crisp and stable speed changes for enhanced riding control. · Premium Metal Ceramic Construction: Combines metal bearings with ceramic balls, CNC iron cutting, and anodizing for superior corrosion resistance and wear durability. · Smooth and Efficient Rotation: Self-lubricating ceramic balls minimize maintenance needs while maximizing transmission efficiency, reducing rider fatigue. · Advanced Ceramic Bearing Process: High-quality ceramic bearings reduce friction and provide excellent lubrication, improving overall riding experience. · Wide Compatibility: Suitable for 8, 9, 10, and 11-speed rear derailleurs, with installation shaft diameters compatible with 4mm, 5mm, and 6mm sizes, ensuring versatile fitment. Specifications: · Item Type: Bicycle Rear Derailleur Pulley · Material: Metal Ceramic · Weight: Approx. 12g / 0.4oz · Size: Diameter approx. 5cm / 2.0in Package Includes: · 1 x Bicycle Rear Derailleur Pulley Upgrade your bike’s drivetrain with this durable and efficient rear derailleur pulley, engineered to provide stable chain control, smooth shifting, and long-lasting performance for cycling enthusiasts and professionals alike.