Enhance your bike’s shifting performance with this high-quality Rear Derailleur Guide Wheel, designed to deliver smooth and reliable gear changes for various types of bicycles. Constructed with a combination of durable aluminum alloy and precision ceramic bearings, this 15T guide pulley offers excellent wear resistance and long-lasting durability, making it an essential upgrade for mountain bikes, road bikes, folding bikes, and more. Key Features: · Premium Aluminum Alloy & Ceramic Bearing Construction: Ensures superior strength, lightweight design, and reliable durability for consistent performance under different riding conditions. · Smooth and Efficient Shifting: The ceramic bearings provide high lubricity and minimize friction, resulting in precise and quiet gear changes to enhance your overall riding experience. · Versatile Speed Compatibility: Supports a wide range of speed settings, making it adaptable to most rear derailleur systems for various bike models. · Practical and Durable Design: The 15T guide wheel is engineered for optimal performance and wear resistance, providing a sturdy accessory that stands up to frequent use. · Compact Dimensions: Measuring approximately 55mm in length, with a 6mm (0.24in) axis, 4mm (0.16in) small ring diameter, and 5mm (0.20in) large ring diameter, this guide wheel fits most standard derailleur setups with ease. Specifications: · Item Type: Rear Derailleur Guide Wheel · Material: Aluminum Alloy + Ceramic Bearing · Type: 15T · Length: Approx. 55mm / 2.2in · Installation Size (Axis): Approx. 6mm / 0.24in · Small Variable Ring Diameter: Approx. 4mm / 0.16in · Large Variable Ring Diameter: Approx. 5mm / 0.20in Package Includes: · 1 x Rear Derailleur Guide Wheel Upgrade your bike’s drivetrain with this robust and lightweight rear derailleur guide wheel, designed to provide smoother gear shifts, enhanced durability, and long-lasting performance for all your cycling adventures.