Enhance your cycling performance with this high-quality Bike Rear Derailleur Pulley, expertly crafted from durable aluminum alloy and steel for exceptional strength and long-lasting use. Designed to be highly compatible, this rear derailleur pulley fits a wide range of mountain and road bicycles, accommodating 4mm, 5mm, and 6mm screws as well as 8 to 11-speed rear derailleur wheels, making it a versatile upgrade for almost any bike. Key Features: · **Wide Compatibility:** Suitable for 8, 9, 10, and 11-speed rear derailleur systems, and compatible with 4mm, 5mm, and 6mm size screws, ensuring a perfect fit for most mountain and road bicycles. · **Premium Aluminum Alloy Construction:** Built with lightweight yet robust aluminum alloy combined with steel components, providing excellent durability, rust resistance, and a long service life without adding unnecessary weight. · **Smooth and Efficient Performance:** Features deepened tooth marks designed to reduce chain dropping and improve shifting accuracy, delivering a smoother and more reliable riding experience. · **Compact and Lightweight Design:** Small and lightweight, this rear derailleur pulley is easy to carry and adds minimal bulk to your bike, while its sleek appearance enhances the overall look of your bicycle. · **Easy Installation:** Simple to install by aligning the holes and securing with screws, allowing for quick replacement or upgrade without hassle. Specifications: · Item Type: Bike Rear Derailleur Pulley · Material: Aluminum Alloy, Steel Package Includes: · 1 x Bike Rear Derailleur Pulley Upgrade your bike’s drivetrain with this durable and efficient rear derailleur pulley, designed to improve shifting performance and provide a safer, more enjoyable cycling experience. Ideal for cyclists seeking reliable, long-lasting components that enhance both function and style.