Enhance your bicycle performance with these high-quality CNC aluminum alloy jockey wheels, designed for durability and smooth operation. Crafted from lightweight yet sturdy 7005 aluminum alloy with an anodized finish, these pulleys are corrosion-resistant and rust-proof, ensuring long-lasting use under various cycling conditions. Equipped with fully rubber-sealed ceramic ball bearings, they guarantee smooth and efficient rotation, reducing friction and improving derailleur performance. Key Features: · Premium CNC Aluminum Alloy Construction: Lightweight, durable, and built to withstand wear and tear, offering reliable performance on every ride. · Anodized Anti-Rust & Corrosion Resistant Finish: Enhances longevity by protecting against environmental damage and corrosion. · Smooth Ball Bearing Operation: Fully rubber-sealed ceramic bearings provide superior smoothness and durability, minimizing maintenance needs. · Wide Compatibility: Designed to fit most rear derailleurs available on the market, supporting 7, 8, 9, and 10-speed setups for versatile application. · Multiple Size & Color Options: Available in 11T (40mm diameter) and 13T (50mm diameter), with color choices of red, blue, and silver to suit your bicycle’s style. · Precision Fit: Compatible with 4/5/6mm roller screw axes, ensuring a secure and precise installation. · Lightweight Package: Each set contains 2 ceramic bearing pulleys, weighing approximately 20g (11T) or 23g (13T), suitable for all riders seeking to optimize their drivetrain efficiency. Specifications: · Material: 7005 Aluminum Alloy · Components: Derailleurs · Bearing Structure: Ceramic Bearings with full rubber sealing · Available Colors: Red, Blue, Silver (optional) · Available Sizes: 11T (40mm diameter), 13T (50mm diameter) · Speed Compatibility: Supports 7/8/9/10-speed rear derailleurs · Quantity: 2 pcs per package · Fit For: 4/5/6mm roller screw axis Package Includes: · 2 x Ceramic Bearing Bicycle Jockey Wheels Upgrade your bicycle’s shifting precision and drivetrain efficiency with these premium CNC machined jockey wheels. Their robust construction and smooth bearing design make them an essential accessory for any cyclist aiming for top performance and durability on the road or trail.