Enhance your mountain biking experience with this high-performance Freewheel Cassette, expertly crafted from premium chrome-molybdenum steel with a nickel-plated surface for superior corrosion resistance and durability. Designed specifically for 9-speed mountain bikes compatible with the HG system, this cassette features an 11-42T gear ratio (11-13-16-20-24-28-32-36-42T) that offers smooth and efficient shifting across a wide range of terrains. Key Features: · Premium Chrome-Molybdenum Steel Construction: Provides excellent strength, heat resistance, and corrosion protection to withstand rigorous riding conditions and extend service life. · Smooth and Quiet Operation: The flywheel rotates steadily without noise, ensuring a secure connection with the bicycle hub for consistent and reliable performance. · Hollow Design for Lightweight Performance: Reduces overall weight without compromising strength, minimizing added burden on your bike and enhancing riding efficiency. · High Strength and Abrasion Resistance: Engineered for durability and long-term use, resistant to wear caused by friction and heat during extended rides. · Wide Gear Ratio Compatibility: The 11-42T gear set delivers versatile gearing options suitable for various mountain biking challenges, providing optimal control and power transfer. · Compatibility: Designed exclusively for 9-speed mountain bikes using the HG system, ensuring seamless integration and smooth gear shifting. Specifications: · Item Type: Freewheel Cassette · Material: Chrome-Molybdenum Steel with Nickel-Plated Surface Treatment · Product Color: As Pictures Shown · Product Weight: Approx. 625g / 22.0oz · Gear Ratio: 11-42T (11-13-16-20-24-28-32-36-42T) · Compatibility: For 9-speed mountain bike, HG system Package Includes: · 1 x Freewheel Cassette This Freewheel Cassette combines durability, precision engineering, and lightweight design to deliver exceptional performance for mountain bikers seeking reliable gear shifting and long-lasting components. Upgrade your bike with this robust and corrosion-resistant cassette for enhanced riding efficiency and control on every trail.