Enhance your mountain bike’s performance with this precision-engineered CNC aluminum alloy pulley wheel, designed for durability, lightweight handling, and smooth operation. Crafted from high-quality anodized aluminum alloy, this pulley is resistant to rust and corrosion, ensuring long-lasting reliability even in challenging riding conditions. Equipped with smooth ball bearings, it delivers efficient and quiet rotation, making it an essential accessory for maintaining optimal bike functionality. Available in 11T and 13T options, this pulley fits most mountain bikes and is compatible with 4mm, 5mm, and 6mm spindle shaft rollers, providing versatile installation options. Choose from four vibrant colors to match your bike’s style and enjoy a smoother cycling experience. Key Features: · CNC Aluminum Alloy Construction: Lightweight yet durable material offers excellent strength and longevity. · Anti-Rust and Corrosion Resistant: Anodized finish protects the pulley from environmental damage, extending its service life. · Smooth Ball Bearings: Ensures quiet and efficient rotation for enhanced bike performance. · Compatible Design: Fits almost all mountain bikes with 11T or 13T pulley options and supports 4/5/6mm spindle shaft rollers. · Multiple Color Options: Available in Black, Red, Golden, and Silver to suit different preferences and bike aesthetics. Specifications: · Material: Aluminum Alloy · Color Options: Black, Red, Golden, Silver · Weight: Approximately 13g (11T), 16g (13T) · Teeth: 11T or 13T (optional) · 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 high-quality pulley wheel combines durability, smooth operation, and compatibility, making it an indispensable upgrade for mountain bike enthusiasts seeking reliable and efficient cycling components.