Bicycle derailleur CYC18T hollow large guide wheel High-Quality Material L

Description 1. Optimized Performance Bicycle Pulley: Enhance your cycling experience with this 18T hollow eccentric guide pulley, specifically engineered for a lightweight upgrade to your derailleur. Its innovative design aims to reduce chain friction, ensuring exceptionally smooth and responsive gear shifts. 2. Premium Construction & Precise Sizing: Crafted from high-grade aluminum alloy and featuring a full ceramic bearing, this pulley combines strength with reduced mass, weighing approximately 28g. The pulley measures about 73mm (7.3 cm / 2.87 inches) in diameter and 5mm (0.5 cm / 0.20 inches) in thickness, designed for a precise fit. 3. Broad Compatibility & Important Note: This guide pulley is widely compatible 9-speed, 10-speed, and 11-speed systems, including specific models like ERX, ER9, R9, R7, and QED. Please note: It does NOT support long cage derailleurs. We strongly advise users to confirm their rear derailleur's compatibility, particularly concerning any specific "card slot" designs that might prevent proper installation. 4. Enhanced Chain Engagement & Silent Operation: Featuring a speciali deep tooth design, this pulley significantly improves the chain's grip, leading to more efficient power transfer and precise gear changes. Enjoy a remarkably quiet ride, as the design minimizes noise and offers sensitive, smooth rotation. 5. Advanced Bearing t: The full ceramic bearing design offers self-lubricating properties, requiring less maintenance and contributing to a quieter operation. This is treated with anodic oxidation, providing resistance against impact, rust, and oxidation, thereby prolonging the product's lifespan and protecting your chain from wear. Package list 1 x 18T Hollow Pulley Wheel