Enhance your mountain biking experience with this high-quality Aluminum Alloy Bicycle Rear Pulley, crafted from durable Al7075 aluminum alloy combined with smooth ceramic bearings for superior performance and long-lasting reliability. Designed to support 7, 8, 9, and 10-speed drivetrains, this rear derailleur pulley offers exceptional compatibility with most rear derailleurs and fits nearly all 12T mountain bikes, making it a versatile upgrade for your bike’s shifting system. Key Features: · Premium Aluminum Alloy Construction: Made from robust Al7075 aluminum alloy, this rear pulley is built for durability and extended service life under demanding riding conditions. · Ceramic Bearings for Reduced Resistance: Equipped with ceramic bearings that minimize friction, improve riding efficiency, and provide stronger, smoother rotation for enhanced shifting performance. · Dual Gear Design for Smooth Shifting: Features alternating positive and negative gear guide wheels that enable faster, smoother speed changes while effectively reducing the risk of chain drop. · Wide Compatibility: Supports 7, 8, 9, and 10-speed systems and fits most rear derailleurs, accommodating 4mm, 5mm, and 6mm guide wheel screws for easy installation. · Optimized Chain Management: Includes one thick gear and one thin gear to fill chain gaps, reduce chain expansion, and accelerate gear shifting, improving overall drivetrain reliability. · Stylish Multicolor Appearance: Showcases a colorful design with stable performance and exquisite workmanship, adding both function and flair to your bike. · Lightweight Design: Weighing approximately 15g (0.5oz), this pulley maintains a lightweight profile that won’t add unnecessary bulk to your bike. Specifications: · Material: Al7075 Aluminum Alloy + Ceramic Bearing · Product Color: Multicolors · Mounting Size: 4/5/6mm axis · Product Weight: Approx. 15g / 0.5oz · Compatibility: Suitable for most rear derailleurs; supports 7/8/9/10 speed systems; fits almost all 12T mountain bikes Package Includes: · 1 x Aluminum Alloy Bicycle Rear Pulley Upgrade your bike’s shifting system with this durable and efficient rear derailleur pulley, engineered to deliver smoother gear transitions, reduce chain drop, and enhance overall riding performance. Perfect for mountain bikers seeking reliability, speed, and style in one compact component.