Enhance your mountain biking experience with this high-quality CNC aluminum alloy pulley wheel, designed for durability, lightweight performance, and smooth operation. Crafted from anodized aluminum alloy, this pulley offers excellent resistance to rust and corrosion, ensuring long-lasting use in various weather conditions. Equipped with precision ball bearings, it delivers smooth rotation and reliable performance, making it an essential accessory for your bicycle drivetrain system. Compatible with most mountain bikes featuring 11T or 13T sprockets, this pulley wheel is a perfect upgrade for improved shifting efficiency and reduced friction. Key Features: · Premium CNC Aluminum Alloy Construction: Lightweight yet highly durable, providing strength and longevity without adding unnecessary weight. · Rust and Corrosion Resistant: Anodized surface treatment protects against environmental wear, extending the lifespan of the pulley wheel. · Smooth Ball Bearing Design: Ensures quiet, efficient, and low-friction rotation for enhanced cycling performance. · Universal Compatibility: Fits most mountain bikes with 11T or 13T sprockets, suitable for 4mm, 5mm, or 6mm spindle shaft rollers. · Multiple Color Options: Available in Black, Red, Golden, and Silver to match your bike’s style and personal preference. Specifications: · Material: Aluminum Alloy (CNC Machined) · Color Options: Black, Red, Golden, Silver · Weight: Approximately 13g (11T), 16g (13T) · Teeth Options: 11T (Diameter approx. 40mm / 1.57"), 13T (Diameter approx. 49mm / 1.92") · Hole Diameter: Approx. 5mm / 0.19" · Compatibility: Suitable for 4mm, 5mm, and 6mm spindle shaft rollers Package Includes: · 1 x 11T or 13T Pulley Wheel This pulley wheel combines precision engineering and robust materials to deliver reliable, smooth performance on your mountain bike. Its lightweight and corrosion-resistant design make it an ideal upgrade for cyclists seeking enhanced drivetrain efficiency and durability.